Data / Nonprofits / Massachusetts / Waltham
Nonprofits in Waltham, MA: 480 registered with the IRS
480 nonprofits are registered with the IRS in Waltham, MA, 406 of them 501(c)(3) charities; the 203 that report revenue took in $1.77 billion. The largest by revenue: Brandeis University ($496.9 million), Bentley University ($414 million), Education Development Center Inc ($159.2 million). Most common causes: education (49), arts, culture and humanities (49), religion-related (48).
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Every organization, largest by revenue first
| Organization | Category | Type | Since | Revenue | Assets | Filing |
|---|---|---|---|---|---|---|
| Brandeis University | Education | 501(c)(3) | 1941 | $496.9 million | $1.97 billion | 2025-06 |
| Bentley University | Education | 501(c)(3) | 1950 | $414 million | $906.6 million | 2025-06 |
| Education Development Center Inc | 501(c)(3) | 1960 | $159.2 million | $124.5 million | 2025-09 | |
| Massachusetts Medical Society | 501(c)(6) | 1994 | $148.7 million | $309.8 million | 2025-05 | |
| Springwell Inc | Human services | 501(c)(3) | 1977 | $119.5 million | $43.7 million | 2025-06 |
| New England Organ Bank Inc | 501(c)(3) | 1969 | $99.4 million | $86.4 million | 2024-12 | |
| Proteus Fund Inc | Education | 501(c)(3) | 1994 | $43.2 million | $67.1 million | 2024-12 |
| Jewish Family and Childrens Service | 501(c)(3) | 1950 | $34.5 million | $56.9 million | 2025-09 | |
| Middlesex Human Service Agency Inc | Housing and shelter | 501(c)(3) | 1978 | $25.3 million | $7.6 million | 2025-06 |
| Chapel Hill-Chauncy Hall School | 501(c)(3) | 1974 | $19.4 million | $27.5 million | 2025-06 | |
| Girl Scouts of Eastern Massachusetts Inc | Youth development | 501(c)(3) | 1983 | $18.9 million | $32.2 million | 2025-09 |
| New England Donor Services Inc | Health care | 501(c)(3) | 2017 | $17.5 million | $61.8 million | 2024-12 |
| More Than Words Inc | 501(c)(3) | 1983 | $12.9 million | $17.1 million | 2025-06 | |
| The Conversation Us Inc | Education | 501(c)(3) | 2013 | $11.2 million | $6.9 million | 2025-06 |
| CHS of Waltham Inc | Health care | 501(c)(3) | 1997 | $11 million | $7 million | 2024-12 |
| Ophthalmic Consultants of Boston Inc Health Welfare & Benefits Plan | Mutual and membership benefit | 501(c)(9) | 2006 | $10.5 million | $5.5 million | 2024-12 |
| Workers Compensation Research Institute | Mutual and membership benefit | 501(c)(3) | 1986 | $8.1 million | $15.4 million | 2025-06 |
| Massachusetts Health Data Consortium Inc | 501(c)(3) | 1978 | $5.9 million | $2.4 million | 2024-12 | |
| Two Ten Footwear Foundation Inc | Community improvement and capacity building | 501(c)(3) | 1985 | $5.6 million | $41.3 million | 2025-06 |
| Bay Colony Development Corp | 501(c)(4) | 1983 | $5.5 million | $6 million | 2025-09 | |
| Waltham Boys and Girls Club Inc | 501(c)(3) | 1948 | $5.5 million | $6.5 million | 2025-06 | |
| Opportunities for Inclusion Inc | Human services | 501(c)(3) | 1971 | $5.4 million | $9.5 million | 2025-06 |
| National Affordable Housing Foundation Schenectady Inc | Housing and shelter | 501(c)(3) | 1992 | $4.9 million | $11.6 million | 2025-12 |
| National Affordable Housing Foundation Taunton Inc | Housing and shelter | 501(c)(3) | 1995 | $4.4 million | $8.5 million | 2025-12 |
| 128 West Transportation Council Inc | 501(c)(4) | 1988 | $4.2 million | $4.2 million | 2024-12 | |
| Wide Horizons for Children Inc | Human services | 501(c)(3) | 1980 | $4 million | $6.1 million | 2025-06 |
| Arc Massachusetts | 501(c)(3) | 1956 | $3.9 million | $5 million | 2025-06 | |
| Gore Place Society | Arts, culture and humanities | 501(c)(3) | 1946 | $3 million | $13.1 million | 2025-06 |
| Reach Beyond Domestic Violence Inc | Human services | 501(c)(3) | 1981 | $2.9 million | $4 million | 2025-06 |
| Accelerated Cure Project Inc | Diseases, disorders and medical disciplines | 501(c)(3) | 2015 | $2.9 million | $3.5 million | 2024-12 |
| Multicultural Neurobehavioral Rehabilitation Center Inc | Human services | 501(c)(3) | 2002 | $2.7 million | $4.6 million | 2025-06 |
| Gersh and Sarah Lemberg Childrens Center Inc | 501(c)(3) | 1972 | $2.6 million | $1.4 million | 2025-06 | |
| Healthy Waltham Inc | Health care | 501(c)(3) | 2013 | $2.6 million | $1.6 million | 2025-06 |
| Fresenius Medical Care Foundation Inc | Human services | 501(c)(3) | 2018 | $2.2 million | $2 million | 2025-12 |
| Jewish Big Brother-Sister Association of Boston | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 1946 | $2.1 million | $2.6 million | 2025-09 |
| Physician Health Services Inc | Mental health and crisis intervention | 501(c)(3) | 1993 | $2 million | $3.3 million | 2025-05 |
| Massachusetts Assisted Living Association Inc | 501(c)(6) | 1995 | $1.9 million | $900,073 | 2025-12 | |
| International Society for Pharmaceutical Engineering Inc | 501(c)(6) | 1983 | $1.9 million | $2.6 million | 2025-12 | |
| The Massachusetts Medical Society and Alliance Charitable Foundation | 501(c)(3) | 1993 | $1.6 million | $4.5 million | 2025-05 | |
| Hillel the Foundation for Jewish Campus Life | 501(c)(3) | 1966 | $1.4 million | $1.5 million | 2025-06 | |
| Community Farms Outreach | Food, agriculture and nutrition | 501(c)(3) | 1996 | $1.3 million | $1.3 million | 2024-12 |
| The Mediation Group Inc | 501(c)(3) | 1986 | $1.3 million | $1.4 million | 2024-12 | |
| Laborers International Union of North America | 501(c)(5) | 1940 | $1.2 million | $1.9 million | 2025-12 | |
| Watch Inc | 501(c)(3) | 1989 | $1.2 million | $740,035 | 2025-06 | |
| Our Generation Speaks | Arts, culture and humanities | 501(c)(3) | 2019 | $1.2 million | $2 million | 2025-12 |
| Spri Inc | 501(c)(6) | 1982 | $1.1 million | $946,557 | 2026-02 | |
| Reagle Music Theatre of Greater Boston Inc | Arts, culture and humanities | 501(c)(3) | 1977 | $1.1 million | $274,431 | 2024-12 |
| Lumen Academy Inc | Education | 501(c)(3) | 2024 | $1.1 million | $1.6 million | 2025-06 |
| Proteus Action League | Civil rights, social action and advocacy | 501(c)(4) | 2004 | $1 million | $1.9 million | 2024-12 |
| Waltham Community Access Corporation | Arts, culture and humanities | 501(c)(3) | 1990 | $981,429 | $1.9 million | 2024-12 |
| Greater Boston Police Council Inc | Crime and legal-related | 501(c)(3) | 1991 | $958,886 | $3.4 million | 2025-06 |
| Waltham Partnership for Youth Inc | Youth development | 501(c)(3) | 1998 | $916,830 | $946,251 | 2025-06 |
| New England Ophthalmological Society Inc 85 Central St | 501(c)(3) | 1985 | $869,699 | $3.4 million | 2025-06 | |
| Global for Good Fund Inc | Human services | 501(c)(3) | 2010 | $826,656 | $269,222 | 2024-12 |
| Metalwerx Inc | Education | 501(c)(3) | 2006 | $816,397 | $540,994 | 2024-12 |
| Charles River Museum of Industry and Innovation Inc | Arts, culture and humanities | 501(c)(3) | 1980 | $770,473 | $1.7 million | 2024-12 |
| Waltham Day Care Center Inc | Human services | 501(c)(3) | 1973 | $760,994 | $622,293 | 2025-06 |
| Waltham Youth Hockey Association Inc | Recreation and sports | 501(c)(3) | 1974 | $716,216 | $535,198 | 2024-04 |
| African Cultural Services Inc | International, foreign affairs and national security | 501(c)(3) | 2013 | $702,231 | $20,402 | 2025-12 |
| Friends of the Waltham Family School Inc | Education | 501(c)(3) | 2013 | $678,610 | $1.3 million | 2025-06 |
| Benchmark One Company Fund Inc | Human services | 501(c)(3) | 2007 | $677,664 | $109,912 | 2025-12 |
| Pflag Greater Boston | 501(c)(3) | 1994 | $663,048 | $698,914 | 2025-09 | |
| Commonwealth Cares Fund Inc | Human services | 501(c)(3) | 2010 | $661,396 | $1.6 million | 2024-12 |
| Jewish Big Brother & Big Sister Association of GR Boston Endowment Fund I | Youth development | 501(c)(3) | 1996 | $654,580 | $9.2 million | 2025-09 |
| American Legion | Public and societal benefit | 501(c)(19) | 1946 | $565,843 | $825,783 | 2024-12 |
| Jonas Willis Parmenter Home Inc | 501(c)(3) | 1956 | $531,974 | $2.3 million | 2025-12 | |
| Massachusetts Medical Benevolent Society | Health care | 501(c)(3) | 1959 | $524,705 | $8.8 million | 2025-10 |
| Spark Photonics Foundation Inc | Science and technology | 501(c)(3) | 2019 | $461,859 | $170,834 | 2024-12 |
| American Academy of Family Physicans | Health care | 501(c)(6) | 1950 | $455,921 | $482,076 | 2025-12 |
| TCC Cat Rescue | Animal-related | 501(c)(3) | 2000 | $452,094 | $133,010 | 2024-12 |
| Association of Fundraising Professionals | 501(c)(3) | 1987 | $435,524 | $273,520 | 2025-06 | |
| Massachusetts Society of Anesthesiologists Inc | 501(c)(6) | 1968 | $433,489 | $1.2 million | 2025-12 | |
| Revive Discipleship | Religion-related | 501(c)(3) | 2022 | $426,454 | $5,752 | 2024-12 |
| Community Day Center of Waltham | 501(c)(3) | 2004 | $410,270 | $1.5 million | 2024-12 | |
| Iglesia Cristo Centro | Religion-related | 501(c)(3) | 2013 | $404,742 | $0 | 2025-12 |
| Kisoboka Uganda | Human services | 501(c)(3) | 2016 | $397,024 | $70,192 | 2025-05 |
| International Association of Fire Fighters | 501(c)(5) | 1966 | $378,750 | $327,618 | 2025-12 | |
| Massachusetts Psychiatric Society | 501(c)(3) | 1967 | $365,247 | $1.2 million | 2025-12 | |
| Waltham Community Foundation Inc | 501(c)(3) | 1947 | $345,536 | $1.7 million | 2025-12 | |
| 7uice Foundation Inc | Youth development | 501(c)(3) | 2022 | $343,768 | $35,770 | 2025-08 |
| M54 Inc | Human services | 501(c)(3) | 2022 | $331,217 | $876,629 | 2025-03 |
| Friends of Bnai Israel Cemetery | Religion-related | 501(c)(3) | 2012 | $322,673 | $2.2 million | 2025-12 |
| Massachusetts Society of Clinical Onocologists Inc | 501(c)(3) | 1985 | $319,612 | $1.4 million | 2025-03 | |
| Delivered To Serve | Community improvement and capacity building | 501(c)(3) | 2017 | $314,423 | $27,207 | 2024-12 |
| Empower Spinal Cord Injury Incorporated | Medical research | 501(c)(3) | 2011 | $310,367 | $1.2 million | 2025-08 |
| Action for Post-Soviet Jewry Inc | International, foreign affairs and national security | 501(c)(3) | 1975 | $308,617 | $672,954 | 2024-06 |
| Sons of Italy of America | 501(c)(8) | 1941 | $295,911 | $1.5 million | 2024-12 | |
| Waltham Police Relief Association Incorporated | 501(c)(9) | 1986 | $289,980 | $1.4 million | 2025-12 | |
| Age Friendly Foundation | Human services | 501(c)(3) | 2019 | $287,753 | $8,952 | 2024-12 |
| Waltham West Suburban Chamber of Commerce Inc | 501(c)(6) | 1942 | $283,104 | $162,350 | 2024-12 | |
| Master Wardens & Members of the Grand Lodge of Masons in Mass | 501(c)(10) | 1954 | $280,456 | $2.8 million | 2025-08 | |
| Waltham Land Trust Inc | Environment | 501(c)(3) | 2000 | $279,093 | $384,482 | 2025-06 |
| Home Builders and Remodelers Association of Massachusetts Inc | 501(c)(6) | 1973 | $276,753 | $104,919 | 2025-12 | |
| Athletes Unlimited Newton Ma Inc | 501(c)(3) | 1991 | $264,896 | $686,838 | 2024-12 | |
| National Center for Jewish Film Inc | Arts, culture and humanities | 501(c)(3) | 1982 | $263,296 | $370,185 | 2025-06 |
| Recovery Homes Collaborative | Community improvement and capacity building | 501(c)(6) | 2004 | $260,487 | $153,597 | 2025-12 |
| Waltham Youth Soccer Association Inc | Recreation and sports | 501(c)(7) | 2021 | $259,079 | $422,422 | 2025-12 |
| Scu Foundation Inc | Religion-related | 501(c)(3) | 2023 | $249,800 | $28,629 | 2024-12 |
| The Samuel Hunington Fund Inc | 501(c)(3) | 2019 | $240,611 | $464,130 | 2025-06 | |
| Planned Giving Group of New England | 501(c)(3) | 1982 | $234,542 | $467,936 | 2025-06 | |
| Uganda Catholic Community in Archdiocese of Boston | Religion-related | 501(c)(3) | 2022 | $220,146 | $208,437 | 2024-12 |
| Alrisala Forum International Inc | Religion-related | 501(c)(3) | 2011 | $218,056 | $508,075 | 2025-12 |
| Waltham Pop Warner Football | Youth development | 501(c)(3) | 2019 | $217,710 | $97,845 | 2025-12 |
| Saint Mary of Carmen Society Inc | Education | 501(c)(3) | 2010 | $215,882 | $169,982 | 2025-12 |
| Massachusetts Clubhouse Coalition Inc | 501(c)(3) | 1994 | $200,730 | $62,355 | 2025-06 | |
| Artists West Association Inc | Arts, culture and humanities | 501(c)(3) | 1981 | $198,455 | $38,459 | 2024-12 |
| The Garden Club Federation of Massachusetts Inc | Environment | 501(c)(3) | 2004 | $188,495 | $1.5 million | 2025-06 |
| Association of Professional Researchers for Advancement | Diseases, disorders and medical disciplines | 501(c)(6) | 1997 | $185,361 | $272,688 | 2025-12 |
| Soviet Jewry Movement Education Project | Arts, culture and humanities | 501(c)(3) | 2022 | $177,614 | $116,501 | 2024-12 |
| Lexington Ski Club Inc | 501(c)(7) | 1967 | $175,130 | $417,914 | 2025-06 | |
| Parents Education Foundation Inc | Education | 501(c)(3) | 2002 | $171,982 | $56,778 | 2025-06 |
| French American Victory Club Inc | 501(c)(7) | 1994 | $160,393 | $350,196 | 2025-12 | |
| Chaplains On the Way Inc | Religion-related | 501(c)(3) | 2022 | $150,307 | $69,128 | 2025-12 |
| Life Giving Water International Inc | Human services | 501(c)(3) | 2015 | $149,159 | $255,928 | 2025-12 |
| Ministerio Palabra Uncion Y Fuego Ebenezer Inc | Religion-related | 501(c)(3) | 2019 | $147,815 | $4,134 | 2025-12 |
| Waltham Lions Charitable Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2006 | $147,602 | $119,203 | 2025-06 |
| Friends of Waltham Public Library Inc | Education | 501(c)(3) | 1986 | $147,369 | $3.2 million | 2024-06 |
| Waltham Lodge No 1018 Loyal Order of Moose | 501(c)(8) | 1935 | $147,013 | $312,143 | 2026-04 | |
| Professional Liability Foundation LTD | 501(c)(6) | 1997 | $145,008 | $291,841 | 2024-12 | |
| New England Orthopedic Society Inc | Health care | 501(c)(3) | 1997 | $144,741 | $49,202 | 2025-12 |
| American College of Physicians | Health care | 501(c)(3) | 1977 | $141,690 | $379,016 | 2025-06 |
| Waltham Educators Association | Community improvement and capacity building | 501(c)(5) | 2014 | $138,874 | $364,459 | 2025-06 |
| New England Association for Healthcare Development | 501(c)(6) | 1992 | $137,332 | $143,285 | 2025-12 | |
| Universidad Simon Boliver Alumni Association of America Inc | Education | 501(c)(3) | 2016 | $129,779 | $222,338 | 2025-12 |
| Waltham News Alliance | Arts, culture and humanities | 501(c)(3) | 2024 | $126,758 | $35,062 | 2025-12 |
| Massachusetts Radiological Society Inc | 501(c)(6) | 1970 | $125,287 | $195,621 | 2025-05 | |
| Center for Eye Research Inc | Medical research | 501(c)(3) | 1988 | $124,309 | $1.8 million | 2025-06 |
| Sons of Italy in America | 501(c)(8) | 1941 | $121,018 | $515,568 | 2025-09 | |
| Paul Tracey 16 Memorial Foundation Inc | Human services | 501(c)(3) | 2025 | $120,991 | $83,646 | 2025-12 |
| Massachusetts Association of Ambulatory Surgery Centers Inc | 501(c)(3) | 1993 | $113,814 | $71,203 | 2025-12 | |
| Indian Circle for Caring USA Inc | Human services | 501(c)(3) | 2014 | $112,770 | $961,283 | 2024-12 |
| Waltham Farmers Market | Food, agriculture and nutrition | 501(c)(3) | 2025 | $110,006 | $71,487 | 2025-12 |
| Ispe Boston Area Chapter Scholarship Foundation Inc | Education | 501(c)(3) | 2017 | $98,747 | $249,129 | 2025-06 |
| Kappa Delta Sorority | 501(c)(7) | 1970 | $95,787 | $34,265 | 2025-06 | |
| Massachusetts Police Charity Fund Inc | Education | 501(c)(3) | 2019 | $89,656 | $826,173 | 2025-09 |
| Maxcen Housing Society Inc Massachusetts Branch | Education | 501(c)(3) | 2010 | $88,484 | $88,484 | 2025-12 |
| Iskwelahang Pilipino Inc | Arts, culture and humanities | 501(c)(3) | 1987 | $87,858 | $220,773 | 2024-06 |
| Bjep Inc | 501(c)(3) | 1975 | $86,224 | $145,420 | 2025-08 | |
| Massachusetts Medical Society | 501(c)(6) | 1994 | $80,494 | $281,670 | 2026-03 | |
| Nepali Class Boston Corporation | Arts, culture and humanities | 501(c)(3) | 2024 | $79,737 | $144,672 | 2026-06 |
| Photographic Historical Society of New England Inc | Arts, culture and humanities | 501(c)(3) | 1977 | $79,341 | $546,029 | 2025-05 |
| Estate Planning Council of Rhode Island | Community improvement and capacity building | 501(c)(6) | 2015 | $76,620 | $112,383 | 2026-06 |
| Society of Saint Vincent de Paul in the Archdiocese of Boston | Religion-related | 501(c)(3) | 2013 | $75,097 | $26,367 | 2025-09 |
| Waltham Tourism Council Inc | Community improvement and capacity building | 501(c)(6) | 2000 | $75,000 | $1 | 2026-06 |
| Waltham Choral Parents Association Inc | Education | 501(c)(3) | 1997 | $74,633 | $114,583 | 2026-06 |
| Boston Sports and Shoulder Center Research Foundation Inc | Health care | 501(c)(3) | 2021 | $74,300 | $28,117 | 2025-06 |
| Massachusetts Medical Society | 501(c)(6) | 1994 | $73,329 | $540,455 | 2025-12 | |
| American Society of Addiction Medicine Inc | Mental health and crisis intervention | 501(c)(3) | 1983 | $71,908 | $113,224 | 2025-12 |
| Advaita Meditation Center A Non Profit Corporation | Arts, culture and humanities | 501(c)(3) | 1977 | $70,783 | $2.1 million | 2026-07 |
| Downtown Waltham Partnership | Community improvement and capacity building | 501(c)(3) | 2010 | $70,542 | $19,459 | 2025-06 |
| Massachusetts Gastroenterology Association Inc | Community improvement and capacity building | 501(c)(6) | 2012 | $69,508 | $37,800 | 2025-12 |
| Robert Treat Paine Historical Trust Judigh K Dimargo Treasurer | Arts, culture and humanities | 501(c)(3) | 1991 | $68,239 | $594,063 | 2025-06 |
| Osia Charitable & Educational Trust | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 1985 | $67,225 | $567,115 | 2024-12 |
| Uganda Muslim Youths of Boston-Inc | Arts, culture and humanities | 501(c)(3) | 2022 | $66,218 | $154,716 | 2024-12 |
| Massachusetts Neurologic Association Inc | Community improvement and capacity building | 501(c)(6) | 2005 | $64,100 | $62,351 | 2025-04 |
| Veterans of Foreign Wars Department of Massachusetts | 501(c)(19) | 1965 | $63,284 | $1.2 million | 2024-12 | |
| Massachusetts Medical Society | 501(c)(6) | 1994 | $62,885 | $385,692 | 2025-12 | |
| New England Otolaryngological Society Inc | Medical research | 501(c)(3) | 2016 | $62,030 | $96,677 | 2024-12 |
| Miller-Tracy Childrens Foundation Inc | Education | 501(c)(3) | 2002 | $61,442 | $153,000 | 2024-12 |
| Badass Waltham Warriors Inc | Human services | 501(c)(3) | 2025 | $61,266 | $55 | 2025-12 |
| Gamma Phi Beta Sorority | 501(c)(7) | 1959 | $60,879 | $45,880 | 2025-07 | |
| Neighbors Who Care Inc | Human services | 501(c)(3) | 2003 | $58,913 | $33,147 | 2023-12 |
| Massachusetts Association of Practicing Urologists Inc | Community improvement and capacity building | 501(c)(6) | 2003 | $58,507 | $52,076 | 2025-05 |
| Lamacchia Cares Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2026 | $54,786 | $22,199 | 2025-06 |
| Rett Syndrome Association of Massachusetts Inc | Health care | 501(c)(3) | 2003 | $52,857 | $139,846 | 2025-09 |
| Waltham Gridiron Club Foundation Inc | Education | 501(c)(3) | 2014 | $52,446 | $57,068 | 2024-12 |
| Watch City Community Boxing and Fitness Inc | Recreation and sports | 501(c)(3) | 2025 | $52,206 | $41,972 | 2025-12 |
| Ggwanga Mujje Bosto Chapter Inc | Arts, culture and humanities | 501(c)(3) | 2013 | $51,613 | $29,402 | 2024-12 |
| Massachusetts Medical Society | 501(c)(6) | 1970 | $48,297 | $601,641 | 2025-12 | |
| Chesterbrook Learning Center | Community improvement and capacity building | 501(c)(3) | 2008 | $48,206 | $64,163 | 2025-06 |
| Friends of the Waltham Seniorcitizens Incc/o Eleanor S MC | 501(c)(3) | 1981 | $45,054 | $66,521 | 2024-12 | |
| Burn Survivors of New England | Health care | 501(c)(3) | 2014 | $40,732 | $84,907 | 2024-12 |
| Springfield Chamber Players Inc | 501(c)(3) | 2021 | $39,850 | $21,443 | 2024-12 | |
| Joseph F Hill Waltham Post No 156 American Legion Band | Public and societal benefit | 501(c)(3) | 1983 | $36,401 | $181,080 | 2024-12 |
| Indian Medical Associates of New England Inc | Health care | 501(c)(3) | 1982 | $35,451 | $281,344 | 2023-12 |
| Prospect Hill Community Foundation Inc | Human services | 501(c)(3) | 2015 | $33,881 | $33,701 | 2025-06 |
| Society for Preservation & Encrgmnt of Barbershop Quartet Singing Amer | 501(c)(3) | 1946 | $32,766 | $17,527 | 2025-12 | |
| Fitzgerald Parent-Teacher Organization Inc | Education | 501(c)(3) | 2013 | $31,227 | $61,176 | 2025-06 |
| Waltham Rotary Fund Inc | 501(c)(3) | 1974 | $26,698 | $28,959 | 2025-06 | |
| Mass Island Corp | Arts, culture and humanities | 501(c)(3) | 2024 | $26,680 | $1 | 2025-06 |
| Agape Child Care Foundation Inc | Public and societal benefit | 501(c)(3) | 2018 | $25,000 | $1 | 2025-12 |
| Thread of Hope Inc | Human services | 501(c)(3) | 2018 | $24,631 | $28,494 | 2025-12 |
| Du Bois Orchestra | Arts, culture and humanities | 501(c)(3) | 2024 | $24,443 | $58 | 2024-12 |
| Pacific Renal Care Foundation | Health care | 501(c)(3) | 2008 | $24,293 | $417,966 | 2025-06 |
| Motorheads Car Club | Health care | 501(c)(3) | 2022 | $20,500 | $0 | 2024-12 |
| Latinos En Accion de Waltham | Human services | 501(c)(3) | 2009 | $17,973 | $474 | 2025-01 |
| Paul Logue Charitable Foundation | Recreation and sports | 501(c)(3) | 2015 | $17,803 | $39,877 | 2024-12 |
| Norfolk District Medical Society Educational Fund Inc | Education | 501(c)(3) | 1971 | $16,670 | $305,214 | 2025-12 |
| Massachusetts Academy of Family Physicians Foundation Inc | Health care | 501(c)(3) | 2016 | $13,692 | $50,481 | 2025-12 |
| Rotary International | Philanthropy, voluntarism and grantmaking foundations | 501(c)(4) | 2014 | $13,527 | $2,263 | 2025-06 |
| International Association of Lions Clubs | 501(c)(4) | 1966 | $13,369 | $2,529 | 2025-06 | |
| Waltham Museum Inc the | Arts, culture and humanities | 501(c)(3) | 1972 | $12,008 | $27,830 | 2024-12 |
| Mbaitu | Community improvement and capacity building | 501(c)(3) | 2021 | $11,576 | $3,675 | 2024-12 |
| Boston Jazz Voices Inc | Arts, culture and humanities | 501(c)(3) | 2011 | $11,233 | $31,055 | 2024-08 |
| Green Rows of Waltham Inc | Environment | 501(c)(3) | 2024 | $7,937 | $18,518 | 2025-12 |
| Vinnie Cirino Memorial Scholarship | 501(c)(3) | 2016 | $6,094 | $78,154 | 2025-12 | |
| Bivf Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2022 | $5,696 | $128,619 | 2025-12 |
| Learning Disabilities Worldwide Inc | Education | 501(c)(3) | 2022 | $5,020 | $6,457 | 2025-12 |
| Greater Boston Functional Medicine Group Inc | Health care | 501(c)(3) | 2017 | $2,813 | $9,610 | 2025-12 |
| Impact Tomorrow Inc | International, foreign affairs and national security | 501(c)(3) | 2019 | $621 | $4,127 | 2024-12 |
| Biff Productions Inc | Arts, culture and humanities | 501(c)(3) | 2008 | $609 | $1,773 | 2024-12 |
| Santa Claus Anonymous Inc | 501(c)(3) | 1992 | $21 | $71,019 | 2025-12 | |
| Massachusetts Senior and Assisted Living Communities Foundation Inc | Education | 501(c)(3) | 2016 | $2 | $5,375 | 2025-12 |
| 45 | 501(c)(3) | 1973 | ||||
| A Step of Faith Christian International Ministries | 501(c)(3) | 2017 | $0 | $0 | 2025-12 | |
| Adam Coveney Memorial Scholarship Fund | Education | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Agap Partners International Inc | Religion-related | 501(c)(3) | 2007 | $0 | $0 | 2025-12 |
| Aging Biology Foundation Inc | Science and technology | 501(c)(3) | 2018 | $26,328 | 2024-12 | |
| Alliance of Divine Love Inc | 501(c)(3) | 1977 | ||||
| Alliance of Divine Love Inc | 501(c)(3) | 1977 | ||||
| Alliance of Divine Love Inc | 501(c)(3) | 1977 | ||||
| Alpha Epsilon Pi Fraternity | 501(c)(7) | 1960 | $0 | $0 | 2025-12 | |
| Alpha Phi Omega Atz | Community improvement and capacity building | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| American Assistance Center Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2017 | $0 | $0 | 2025-12 |
| American Society of Islamic Philosophy and Theology | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Andromeda Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2010 | $2.2 million | 2025-12 | |
| Angies Children Inc | Human services | 501(c)(3) | 2025 | |||
| Antioch Community Church of Waltham | Religion-related | 501(c)(3) | 2011 | |||
| Antioch New England | Religion-related | 501(c)(3) | 2004 | |||
| Bagong Kulturang Pinoy Inc | Arts, culture and humanities | 501(c)(3) | 2002 | $0 | $0 | 2025-12 |
| Bahais of Waltham | 501(c)(3) | 1995 | ||||
| Bashde Inc | Religion-related | 501(c)(3) | 2010 | $0 | $0 | 2025-12 |
| Baystate Io Inc | Human services | 501(c)(3) | 2025 | |||
| Berkshire District Medical Society | 501(c)(6) | 1971 | $0 | $0 | 2025-08 | |
| Beta Alpha Psi National Council | 501(c)(3) | 1974 | $0 | $0 | 2026-04 | |
| Bethany Christian United Parish | 501(c)(3) | 1951 | ||||
| Better for Better Inc | Community improvement and capacity building | 501(c)(3) | 2025 | |||
| Bloom Child Support Inc | Human services | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Boston Clavichord Society Inc | Arts, culture and humanities | 501(c)(3) | 1995 | $0 | $0 | 2024-12 |
| Boston International Symphony Orchestra Inc | Arts, culture and humanities | 501(c)(3) | 2025 | $0 | $1 | 2025-12 |
| Boston Young Black Professionals | Arts, culture and humanities | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Brandeis Voicemale | Arts, culture and humanities | 501(c)(3) | 2017 | $0 | $0 | 2026-07 |
| Brewa Foundation Inc | Mental health and crisis intervention | 501(c)(3) | 2025 | |||
| Bridging Mind and Body Inc | 501(c)(3) | 2015 | $0 | $0 | 2023-12 | |
| Brightbridge Foundation Inc | Human services | 501(c)(3) | 2011 | $0 | $0 | 2025-12 |
| Cambridge International Film Festival Inc | Arts, culture and humanities | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Centro Chistiano de Adoracion de Waltham | 501(c)(3) | 1964 | ||||
| Chabad of Brandeis Inc | Religion-related | 501(c)(3) | 2001 | |||
| Charleys Strays Inc | Animal-related | 501(c)(3) | 1995 | $0 | $0 | 2025-09 |
| Citypoint Association Inc | Community improvement and capacity building | 501(c)(6) | 2016 | $0 | $0 | 2025-12 |
| Climate Change Outreach | Environment | 501(c)(3) | 2014 | $0 | $0 | 2024-12 |
| Contractors Childrens Fund | Education | 501(c)(3) | 2016 | $0 | $0 | 2024-12 |
| Creative Word Assembly Christian Center Inc | Religion-related | 501(c)(3) | 2014 | |||
| DTS Charitable Foundation | 501(c)(3) | 1989 | $2.2 million | 2024-12 | ||
| DWSS Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2007 | $6.9 million | 2024-12 | |
| Daniella Education Center Corporation | Human services | 501(c)(3) | 2023 | $0 | $0 | 2024-12 |
| Daoyin Health Society | Health care | 501(c)(3) | 2017 | $14,676 | 2025-12 | |
| Dassault Systemes Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2016 | $135,871 | 2025-12 | |
| Department of Massachusetts VFW Auxiliary | Public and societal benefit | 501(c)(19) | 2009 | $0 | $0 | 2026-06 |
| Department of the Air Force Company Grade Officers Council | Public and societal benefit | 501(c)(19) | 2025 | $0 | $0 | 2025-12 |
| Destiny Matters International Inc | Arts, culture and humanities | 501(c)(3) | 2021 | $0 | $0 | 2024-12 |
| Disabled American Veterans | 501(c)(4) | 1942 | $0 | $0 | 2025-06 | |
| Doctor Max & Ida L Millman Foundation | 501(c)(3) | 1976 | $74,090 | 2025-12 | ||
| Dominants Mission | Arts, culture and humanities | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Dominion Assemblies International Church | Religion-related | 501(c)(3) | 2019 | $0 | $0 | 2024-12 |
| Donald & Priscilla Felt Charitable Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2010 | $1.8 million | 2025-12 | |
| Doris Buffett Legacy Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2017 | $5 million | 2024-12 | |
| Ebenezer Healing Center House of Prayer | Religion-related | 501(c)(3) | 2022 | $0 | $0 | 2022-12 |
| Education Collaborative for Greater Boston Inc | Education | 501(c)(3) | 1970 | 2013-06 | ||
| Eli Depace Memorial Scholarship | Education | 501(c)(3) | 2025 | $0 | $0 | 2024-09 |
| Elim Evangelical Church | 501(c)(3) | 1965 | ||||
| Ellis L Phillips Foundation | 501(c)(3) | 1947 | $4.6 million | 2025-06 | ||
| Emerge Contemporary Art Inc | Arts, culture and humanities | 501(c)(3) | 2022 | $0 | $0 | 2024-12 |
| Empath Homes | Human services | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Entrepreneurial Ecosystems Inc | Community improvement and capacity building | 501(c)(3) | 2026 | |||
| Espousal Retreat Center Inc | 501(c)(3) | 1946 | 2010-12 | |||
| First Baptist Church | 501(c)(3) | 1955 | ||||
| First Evangelical Lutheran Church | 501(c)(3) | 1988 | ||||
| Fondation Sephora Moron | 501(c)(3) | 2020 | $0 | $0 | 2022-12 | |
| Foundation Pierre Fokem Inc | Human services | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Friends of Massachusetts Speech Language Hearing Association Inc | Education | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| From This Rock Inc | Community improvement and capacity building | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Fryeburg New Church Assembly | Religion-related | 501(c)(3) | 2002 | |||
| Funwee Basketball LTD | Recreation and sports | 501(c)(3) | 2024 | $1 | 2025-12 | |
| G F P Inc | Arts, culture and humanities | 501(c)(3) | 1997 | $0 | $0 | 2025-05 |
| Gann Academy the New Jewish High School of Greater Boston Inc | Education | 501(c)(3) | 1995 | |||
| Garden Club Federation of Massachusetts Inc | Environment | 501(c)(3) | 2004 | $0 | $0 | 2025-06 |
| Grace Christian Church | 501(c)(3) | 1959 | ||||
| Greater Boston Chapter - American Association of Blacks in Energy | Education | 501(c)(3) | 2021 | $0 | $15,567 | 2024-12 |
| Greater New England Society for Post Acute and Long Term Care Inc | Health care | 501(c)(6) | 2011 | $0 | $0 | 2025-07 |
| Grewal Charitable Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2000 | $9,170 | 2025-06 | |
| Haitian American New Vision of Waltham | Human services | 501(c)(3) | 2024 | $0 | $0 | 2026-07 |
| Happy at Home Orphanag Inc | Human services | 501(c)(3) | 2022 | $0 | $0 | 2024-12 |
| Hded Inc | Human services | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Health Education Charitable Foundat Ion Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2026 | |||
| Health Home Initiative -Hhi | Arts, culture and humanities | 501(c)(3) | 2019 | $0 | $0 | 2024-12 |
| Henry Edward Ssuuna Ministries Inc | Religion-related | 501(c)(3) | 2021 | $0 | $0 | 2024-12 |
| Henry Whittemore School Parent-Teacher Organization Inc | Education | 501(c)(3) | 2023 | $0 | $0 | 2025-06 |
| His Voice Ministries Intl Inc | Religion-related | 501(c)(3) | 2025 | |||
| Home for Veterans Network Launch Trust | Public and societal benefit | 501(c)(3) | 2020 | $7,392 | 2025-12 | |
| Hope International Church | 501(c)(3) | 1965 | ||||
| Hope for A Brighter Day | International, foreign affairs and national security | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Hovey Players Inc | 501(c)(3) | 1963 | $0 | $0 | 2025-06 | |
| Iglesia Evangelica Pentecostes Sol de Justicia Inc | Religion-related | 501(c)(3) | 2020 | |||
| Iglesia Fraternidad Crestiana Inc | Religion-related | 501(c)(3) | 2014 | |||
| Iglesia Pentecostes Sinai | Religion-related | 501(c)(3) | 2023 | |||
| Ikatun | Arts, culture and humanities | 501(c)(3) | 2002 | $0 | $0 | 2026-06 |
| Illuminus Foundation LTD | Arts, culture and humanities | 501(c)(3) | 2026 | |||
| Impact Ministries International Inc | Religion-related | 501(c)(3) | 2023 | |||
| Interfaith Center Inc | 501(c)(3) | 1972 | ||||
| International Culture & Education Promotion Association Inc | International, foreign affairs and national security | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| J Family Project Inc | Arts, culture and humanities | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| J M R Barker Foundation | 501(c)(3) | 1968 | $84.5 million | 2024-12 | ||
| Japa Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2004 | $652,313 | 2024-12 | |
| Jazz Composers Alliance Inc | Arts, culture and humanities | 501(c)(3) | 2014 | $0 | $0 | 2025-07 |
| Jeffrey M Doucette Memorial | Education | 501(c)(3) | 2017 | $0 | $0 | 2025-09 |
| Jewish Family and Childrens Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 1991 | $0 | $3.3 million | 2025-09 |
| Joann Denapoli Charitable Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2016 | $3.9 million | 2025-12 | |
| John Butler Mulliken Foundation Inc | Animal-related | 501(c)(3) | 1999 | $1.3 million | 2025-05 | |
| Kamurjner Cultural Connections Inc | Arts, culture and humanities | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Kennedy Middle School Parent Teacher Organization | Education | 501(c)(3) | 2025 | |||
| Kids Are Scientists Too Incorporated | Education | 501(c)(3) | 2015 | $0 | $0 | 2024-06 |
| King Family Scholarship Fund Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2014 | $0 | $0 | 2023-12 |
| Kingsbury Temperance Fund | 501(c)(3) | 1966 | $106,938 | 2023-05 | ||
| Knights of Columbus | 501(c)(8) | 1940 | $0 | $0 | 2025-12 | |
| Knights of Columbus | 501(c)(8) | 1940 | $0 | $0 | 2025-12 | |
| Knights of Columbus | 501(c)(8) | 1940 | $0 | $0 | 2025-12 | |
| Knights of Columbus | 501(c)(8) | 1940 | $0 | $0 | 2025-12 | |
| Korean Hope Church in Boston Inc | 501(c)(3) | 1994 | ||||
| Lady Hawks Hoopsters Boosters Inc | Education | 501(c)(3) | 2018 | $0 | $0 | 2025-08 |
| Lavana Productions | Education | 501(c)(3) | 2002 | $0 | $0 | 2024-12 |
| League of Women Voters of Massachusetts | 501(c)(4) | 1969 | $0 | $0 | 2025-06 | |
| Life Empowerment for Pregnancy Choi Ces Inc | Health care | 501(c)(3) | 2026 | $0 | $0 | 2025-12 |
| Lincoln Park Baptist Church | 501(c)(3) | 1955 | ||||
| Linda K Marino Charitable Trust | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2007 | $136,465 | 2024-12 | |
| Lins Institute of Science | Science and technology | 501(c)(3) | 2019 | $175,325 | 2025-12 | |
| Love and Care International Inc | Food, agriculture and nutrition | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| MD Waltham Youth Wrestling Inc | Recreation and sports | 501(c)(3) | 2018 | $0 | $0 | 2025-05 |
| MR Owl Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2013 | $2.6 million | 2025-06 | |
| Macarthur School Pto | Education | 501(c)(3) | 2005 | $0 | $0 | 2025-06 |
| Marion P Manzon Scholarship Corp | Education | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| Martin C Mihm Jr Charitable Foundation | Arts, culture and humanities | 501(c)(3) | 2025 | |||
| Maslows Light | Arts, culture and humanities | 501(c)(3) | 2019 | $0 | $0 | 2023-12 |
| Massachusetts Medical Society | 501(c)(6) | 1994 | $0 | $0 | 2026-03 | |
| Massachusetts Medical Society | 501(c)(6) | 1970 | $0 | $0 | 2025-12 | |
| Massachusetts Medical Society | 501(c)(6) | 1994 | $0 | $0 | 2026-05 | |
| Massachusetts Medical Society | 501(c)(6) | 1994 | $0 | $0 | 2026-05 | |
| Massachusetts Medical Society | 501(c)(6) | 1994 | $0 | $0 | 2026-05 | |
| Massachusetts Medical Society | 501(c)(6) | 1994 | $0 | $0 | 2025-12 | |
| Massachusetts Medical Society | 501(c)(6) | 1994 | $0 | $0 | 2025-12 | |
| Massachusetts Medical Society | 501(c)(6) | 1994 | $0 | $0 | 2025-12 | |
| Massachusetts Medical Society | 501(c)(6) | 1994 | $0 | $0 | 2025-05 | |
| Massachusetts Medical Society | 501(c)(6) | 1994 | $0 | $0 | 2025-12 | |
| Massachusetts Medical Society | 501(c)(6) | 1994 | $0 | $0 | 2025-12 | |
| Massachusetts Medical Society Auxiliary Inc | 501(c)(6) | 1970 | $0 | $0 | 2026-05 | |
| Massachusetts Open-Water Swimming Association | Recreation and sports | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Massachusetts Society of Traditional Chinese Medicine Inc | Health care | 501(c)(3) | 2020 | $24,991 | 2025-12 | |
| Massnaela Foundation | Crime and legal-related | 501(c)(3) | 2026 | |||
| Maureen Ministries International Inc | Community improvement and capacity building | 501(c)(3) | 2022 | $0 | $0 | 2024-12 |
| McClary Family Foundation Inc | Education | 501(c)(3) | 2024 | $1 | 2024-12 | |
| McDevitt Parent-Teacher Organization Inc | Education | 501(c)(3) | 2021 | $0 | $0 | 2025-06 |
| Mercer Family Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2005 | $88.3 million | 2024-12 | |
| Merlin Charitable Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2014 | $413,806 | 2025-12 | |
| Mightydrum Inc | Mental health and crisis intervention | 501(c)(3) | 2018 | $0 | $0 | 2025-06 |
| Mindful Charity | Health care | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Ministerio Abba Padre Internacional Inc | Religion-related | 501(c)(3) | 2012 | |||
| Ministerio Central Casa Del Alfarero Inc | Religion-related | 501(c)(3) | 2015 | |||
| Ministerio Evangelico Peniel Inc | Religion-related | 501(c)(3) | 2021 | |||
| Ministerio Internacional Rios de Dios Inc | Religion-related | 501(c)(3) | 2020 | |||
| Ministerios de Vida Internacional Inc | Religion-related | 501(c)(3) | 2017 | |||
| Mirembe Pathways Initiative Incorpo Ration | Youth development | 501(c)(3) | 2026 | |||
| Missionary Church of Christ of Waltham Mass | Religion-related | 501(c)(3) | 1999 | |||
| Missionica Ebenezer Inc | Health care | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Modern Quilt Guild Inc | Arts, culture and humanities | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Morijah Evangelical Missionary Church | 501(c)(3) | 1965 | ||||
| National Biomedical Research Foundation Inc | Medical research | 501(c)(3) | 2002 | $2 million | 2025-06 | |
| National Center On Adoption and Permanency Inc | Human services | 501(c)(3) | 2015 | $0 | $0 | 2025-12 |
| New Covenant Church of Cambridge | 501(c)(3) | 1988 | ||||
| New England Model Engineering Society Inc | Community improvement and capacity building | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| New England Ugandan Muslim Society | Religion-related | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| New Harmony Line Inc | Arts, culture and humanities | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| New Light Korean Church | Religion-related | 501(c)(3) | 2005 | |||
| Newton Community Chorus Inc | Arts, culture and humanities | 501(c)(3) | 2012 | $0 | $0 | 2026-06 |
| Newton Samuel Johnson Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2022 | $417,301 | 2025-12 | |
| Next Generation Housing Foundation Inc | Housing and shelter | 501(c)(3) | 2008 | $0 | $1.3 million | 2025-09 |
| Nitas Kids Foundation Inc | Education | 501(c)(3) | 2014 | $0 | $0 | 2024-12 |
| Nkiima Foundation Inc | Community improvement and capacity building | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| No Barriers Inc | Youth development | 501(c)(3) | 2024 | |||
| Northeast Elementary Parent-Teacher Organization | Education | 501(c)(3) | 2020 | $0 | $0 | 2025-06 |
| Oakpoint Charitable Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2017 | $35.7 million | 2024-12 | |
| Pacer Foundation | 501(c)(3) | 1991 | $5.7 million | 2025-06 | ||
| Paul A Mitchell Foundation | Human services | 501(c)(3) | 2023 | $3,456 | 2025-12 | |
| Peter Manzon Scholarship Corp | Education | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| Piety Corner Club | 501(c)(7) | 1945 | $0 | $0 | 2026-05 | |
| Plympton School Parent Teacher Organization | Education | 501(c)(3) | 2006 | $0 | $0 | 2026-06 |
| Privitera Family Charitable Foundation | 501(c)(3) | 2001 | $988,349 | 2025-12 | ||
| Proprietors of the Burnett Burial Park | Mutual and membership benefit | 501(c)(13) | 2013 | $0 | $0 | 2025-12 |
| Psi Chi the International Honor Society in Psychology | 501(c)(3) | 1957 | $0 | $0 | 2026-06 | |
| Quality Archives Collective | Arts, culture and humanities | 501(c)(3) | 2026 | |||
| Radio Uganda Boston Boston Inc | Arts, culture and humanities | 501(c)(3) | 2026 | $0 | $0 | 2021-12 |
| Refugee Projects Inc | International, foreign affairs and national security | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Renaissance Christian Church | Religion-related | 501(c)(3) | 2019 | |||
| Renew Africa Inc | Community improvement and capacity building | 501(c)(3) | 2026 | |||
| Revvity Foundation | 501(c)(3) | 1979 | $10 million | 2025-06 | ||
| Rexhame Beach Community Association | 501(c)(4) | 1990 | $0 | $0 | 2025-12 | |
| Right To Immigration Institute Inc | International, foreign affairs and national security | 501(c)(3) | 2016 | $0 | $0 | 2026-01 |
| Rise and Read International Inc | Education | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Rivers of Life Assembly International Ministries Inc | Religion-related | 501(c)(3) | 2026 | |||
| Road Runners Club of America | 501(c)(3) | 1976 | $0 | $0 | 2025-12 | |
| Rosalyn & Richard Slifka Char Trust | 501(c)(3) | $5.8 million | 2024-12 | |||
| Roy Mubiru Foundation | Civil rights, social action and advocacy | 501(c)(3) | 2025 | |||
| Russ and Nancy Malone Memorial Foundation Inc | Human services | 501(c)(3) | 2023 | $0 | $0 | 2023-12 |
| Rvty Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2021 | $9.8 million | 2025-06 | |
| Sacred Heart | 501(c)(3) | 1946 | 2012-06 | |||
| Score House of Hope | Religion-related | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| Seoul Boston International Film Fes Tival Inc | Arts, culture and humanities | 501(c)(3) | 2026 | |||
| Seth Tiberius Foundation Inc | Health care | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Seven Miles From Jerusalem Inc | Religion-related | 501(c)(3) | 2018 | $91,974 | 2024-12 | |
| Sigma Delta Tau Society | Education | 501(c)(7) | 1948 | $0 | $0 | 2025-06 |
| Signs and Wonders Liberty Ministries | Religion-related | 501(c)(3) | 2015 | $0 | $0 | 2024-12 |
| Siloam Church of Boston | Religion-related | 501(c)(3) | 2006 | |||
| Singing Field Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 1998 | $3.6 million | 2024-05 | |
| Single Step Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2008 | $765,602 | 2025-12 | |
| Society of Saint Vincent de Paul in the Archdiocese of Boston | Religion-related | 501(c)(3) | 2013 | $0 | $0 | 2025-09 |
| Society of Saint Vincent de Paul in the Archdiocese of Boston | Religion-related | 501(c)(3) | 2013 | $0 | $0 | 2025-09 |
| Sol Y Salud Inc | Health care | 501(c)(3) | 2026 | |||
| Spring of Life Church Boston Inc | Religion-related | 501(c)(3) | 2015 | |||
| Ssali Foundation Inc | Community improvement and capacity building | 501(c)(3) | 2022 | $0 | $0 | 2023-12 |
| St Mary & St Demiana Coptic Orthodox Church Inc | Religion-related | 501(c)(3) | 2020 | |||
| St Mary Parish | 501(c)(3) | 2012-06 | ||||
| St Mary and St George Coptic Orthodox Church Inc | Religion-related | 501(c)(3) | 2016 | |||
| St Pauls Anglican Church Waltham Inc | Religion-related | 501(c)(3) | 2017 | |||
| St Peters Anglican Church Boston | Religion-related | 501(c)(3) | 2018 | |||
| Steinway Society of Massachusetts | Arts, culture and humanities | 501(c)(3) | 2019 | $0 | $0 | 2024-12 |
| Stephen & Karla Forgiel Charitable Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2014 | $625,485 | 2025-12 | |
| Stories With Purpose Inc | 501(c)(3) | 2020 | $0 | $0 | 2026-01 | |
| Sustainable Healthcare for Haiti Inc | Human services | 501(c)(3) | 2012 | $0 | $0 | 2025-12 |
| Tabitha Aid International Inc | Public and societal benefit | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Telna Foundation for Albinos | Human services | 501(c)(3) | 2015 | $0 | $0 | 2025-12 |
| Temple Beth Israel Non Profit | 501(c)(3) | 2019 | ||||
| The A&A Fund | 501(c)(3) | 1992 | $7.5 million | 2024-12 | ||
| The Bird Precision Charitable Foundation | 501(c)(3) | 1963 | $95,682 | 2025-12 | ||
| The Emmaus Ministry for Grieving Parents Inc | Mental health and crisis intervention | 501(c)(3) | 2012 | $0 | $0 | 2025-12 |
| The Paul and Phyllis Fireman Charitable Foundation | 501(c)(3) | 1986 | $178.8 million | 2024-12 | ||
| Tillerman Foundation | Human services | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Toastmasters International | 501(c)(3) | 1945 | $0 | $0 | 2025-12 | |
| Toastmasters International | 501(c)(3) | 1945 | $0 | $0 | 2025-12 | |
| Toastmasters International | 501(c)(3) | 1945 | $0 | $0 | 2025-12 | |
| Toastmasters International | 501(c)(3) | 1945 | $0 | $0 | 2025-12 | |
| Toastmasters International | 501(c)(3) | 1945 | $0 | $0 | 2023-12 | |
| Trillion Tree Trust Inc | Environment | 501(c)(3) | 2021 | $0 | $0 | 2025-01 |
| Trinacria Theatre Company | Arts, culture and humanities | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| Turpin Family Charitable Foundation | 501(c)(3) | 1993 | $2.2 million | 2025-06 | ||
| Uncharted Horizons Foundation Inc | Public and societal benefit | 501(c)(3) | 2026 | $1.5 million | 2025-12 | |
| University of Massachusetts | 501(c)(3) | 2013 | $0 | $0 | 2025-06 | |
| University of Massachusetts | Youth development | 501(c)(3) | 2013 | $0 | $0 | 2025-06 |
| Voices Meet Minds Inc | Mental health and crisis intervention | 501(c)(3) | 2026 | |||
| Waltham Amateur Radio Association | 501(c)(7) | 1993 | $0 | $0 | 2024-12 | |
| Waltham Arts Council Inc | 501(c)(3) | 1976 | $0 | $0 | 2025-06 | |
| Waltham Building Maintenance Workers Association | Environment | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Waltham Centennial Scholarship Foundation | Human services | 501(c)(3) | 2012 | $138,493 | 2025-12 | |
| Waltham Chapter 2456 Women of the Moose | 501(c)(8) | 1940 | $0 | $0 | 2025-12 | |
| Waltham Cooperative Playgroup Inc | Public and societal benefit | 501(c)(3) | 2014 | $0 | $0 | 2025-06 |
| Waltham Dual Language Parent Teacher Organization | Education | 501(c)(3) | 2018 | $0 | $0 | 2026-06 |
| Waltham Education and Beyond Foundation Inc | Education | 501(c)(3) | 2017 | $0 | $0 | 2025-06 |
| Waltham Friends of Scouting Incorporated | Community improvement and capacity building | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Waltham Girls Softball | Recreation and sports | 501(c)(3) | 2023 | $21,168 | 2026-01 | |
| Waltham Hawks Lacrosse Foundation I NC | Recreation and sports | 501(c)(3) | 2026 | |||
| Waltham Historical Society Inc | 501(c)(3) | 1964 | $0 | $0 | 2025-05 | |
| Waltham Islamic Society Inc | Religion-related | 501(c)(3) | 2008 | $0 | $1 | 2024-12 |
| Waltham Partners of Performers and Presenters | Education | 501(c)(3) | 2025 | |||
| Waltham Philharmonic Orchestra Inc | 501(c)(3) | 1988 | $0 | $0 | 2025-08 | |
| Waltham Post 2152 Veterans of Foreign Wars of United States | Public and societal benefit | 501(c)(19) | 2025 | $0 | $0 | 2025-06 |
| Waltham West Suburban Chamber of Commerce Foundation | Education | 501(c)(3) | 1997 | $16,157 | 2025-05 | |
| Waltham Youth Field Hockey Inc | Youth development | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Waltham Youth Football & Cheer Scholarship Fund | 501(c)(3) | 2023 | $32,284 | 2025-12 | ||
| Warmline Advisory Group Inc | Mental health and crisis intervention | 501(c)(3) | 2025 | |||
| Washington County Maine Records Preservation Fund | Arts, culture and humanities | 501(c)(3) | 2000 | $0 | $0 | 2025-12 |
| Watch City Arts | Arts, culture and humanities | 501(c)(3) | 2024 | |||
| Watertown | 501(c)(3) | 1972 | ||||
| Watertown Running Club Inc | Recreation and sports | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Watertown-Belmont Youth Football and Cheer Inc | Recreation and sports | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| Weissman Fam Charitable Foundation 11152000 | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2001 | $6.7 million | 2024-12 | |
| William F Stanley Elementary School Pto | Education | 501(c)(3) | 2015 | $0 | $0 | 2026-06 |
| Woburn Church of God | 501(c)(3) | 1972 | ||||
| Women of Purpose Intl | Religion-related | 501(c)(3) | 2015 | $0 | $0 | 2025-12 |
| Women of Solution International-Inc | Religion-related | 501(c)(3) | 2026 | |||
| Wopi Boston Inc | 501(c)(3) | 2021 | $0 | $0 | 2025-12 | |
| World Record Breakers Club | Human services | 501(c)(3) | 2026 | |||
| Zeitz Foundation | 501(c)(3) | 1990 | $72,594 | 2025-12 |
By cause in Waltham, MA
- Education 49
- Arts, culture and humanities 49
- Religion-related 48
- Human services 39
- Philanthropy, voluntarism and grantmaking foundations 30
- Health care 23
- Community improvement and capacity building 23
- Recreation and sports 11
- Public and societal benefit 10
- Youth development 9
- Mental health and crisis intervention 7
- Environment 7
- International, foreign affairs and national security 7
- Housing and shelter 4
- Medical research 4
- Animal-related 3
- Mutual and membership benefit 3
- Food, agriculture and nutrition 3
- Science and technology 3
Nonprofits in every city of the state
Read from the IRS Exempt Organizations Business Master File, updated by the IRS on October 24, 2026 and rebuilt here every morning. Revenue and assets are from each organization's latest filing as the IRS lists it; the IRS record is the official one. Organizations only: no people are named on these pages.