Data / Nonprofits / California / Ontario
Nonprofits in Ontario, CA: 529 registered with the IRS
529 nonprofits are registered with the IRS in Ontario, CA, 463 of them 501(c)(3) charities; the 140 that report revenue took in $1.34 billion. The largest by revenue: Prime Healthcare Foundation Inc ($926.3 million), Iapmo Research and Testing Inc ($67.4 million), Unicare Community Health Center Inc ($65.5 million). Most common causes: religion-related (95), human services (56), education (54).
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The 500 largest by revenue
| Organization | Category | Type | Since | Revenue | Assets | Filing |
|---|---|---|---|---|---|---|
| Prime Healthcare Foundation Inc | Health care | 501(c)(3) | 2015 | $926.3 million | $2.14 billion | 2024-12 |
| Iapmo Research and Testing Inc | 501(c)(6) | 1995 | $67.4 million | $24.8 million | 2024-12 | |
| Unicare Community Health Center Inc | Education | 501(c)(3) | 2003 | $65.5 million | $59.5 million | 2025-06 |
| Real Journey Academies Inc | Education | 501(c)(3) | 2011 | $63.3 million | $133.8 million | 2025-06 |
| Benson House Inc | Community improvement and capacity building | 501(c)(3) | 1995 | $26.3 million | $9.8 million | 2024-12 |
| Ontario Christian School Association | Education | 501(c)(3) | 1952 | $19.8 million | $29.9 million | 2025-06 |
| Inland Christian Home Inc | Human services | 501(c)(3) | 1973 | $17.4 million | $31.6 million | 2025-12 |
| International Association of Plumbing and Mechanical Officials | 501(c)(6) | 1949 | $15 million | $43.8 million | 2024-12 | |
| Anthesis Services | Employment | 501(c)(3) | 1966 | $10.3 million | $5.7 million | 2025-12 |
| Building Bridges Foster Family Agency | Human services | 501(c)(3) | 2014 | $9.1 million | $3.5 million | 2024-12 |
| California Credit Union League | 501(c)(6) | 1952 | $8.8 million | $35.7 million | 2024-12 | |
| Ampac Tri-State CDC Inc | Community improvement and capacity building | 501(c)(3) | 2006 | $7.2 million | $18.7 million | 2024-12 |
| Ontario Cementery Association | 501(c)(13) | 1946 | $6.1 million | $34 million | 2025-12 | |
| International Association of Heat & Frost Insulators & Allied Workers | 501(c)(5) | 1940 | $5.8 million | $15.5 million | 2024-12 | |
| West End Family Counseling Service | Mental health and crisis intervention | 501(c)(3) | 1963 | $5.7 million | $2.3 million | 2025-06 |
| Greater Ontario Convention and Visitors Bureau | Community improvement and capacity building | 501(c)(6) | 2024 | $5.6 million | $371,079 | 2025-06 |
| District Council of Ironworkers of the State of California & Vicinity | 501(c)(5) | $5.1 million | $27.9 million | 2025-06 | ||
| Scpga Foundation Inc | Education | 501(c)(3) | 1995 | $5.1 million | $1.5 million | 2024-12 |
| Western States Drywall Lathing Industry LM Co-Op Committee Inc | 501(c)(6) | 1984 | $4.6 million | $17.8 million | 2025-12 | |
| Sporting California Inc | Recreation and sports | 501(c)(3) | 2022 | $4.2 million | $3.2 million | 2024-12 |
| Futuro Infantil Hispano | 501(c)(3) | 1994 | $3.6 million | $2.6 million | 2025-06 | |
| Real Journey Academies Foundation Inc | Education | 501(c)(3) | 2015 | $3.5 million | $76.6 million | 2025-06 |
| Warehouse Worker Resource Center | Employment | 501(c)(3) | 2013 | $3 million | $2.9 million | 2024-12 |
| Asbestos Workers Joint Apprenticeship Fund | 501(c)(5) | 1963 | $2.7 million | $4.7 million | 2025-03 | |
| 4TH Watch Educational Services | Education | 501(c)(3) | 2025 | $2.4 million | $3.4 million | 2025-12 |
| Downs & Martin Childrens Services | Recreation and sports | 501(c)(3) | 1998 | $2.2 million | $990,318 | 2024-12 |
| Humane Society of the Chaffey Community Inc | Animal-related | 501(c)(3) | 1959 | $2.1 million | $2.3 million | 2025-06 |
| Western Cuna Management School | Education | 501(c)(3) | 1999 | $2.1 million | $1.6 million | 2024-12 |
| Sickle Cell Disease Foundation of California | Diseases, disorders and medical disciplines | 501(c)(3) | 1967 | $1.9 million | $1.3 million | 2025-12 |
| United Brotherhood of Carpenters & Joiners of America | 501(c)(5) | 1970 | $1.7 million | $309,670 | 2025-06 | |
| Aircondting & Refrgration CNTRCTRS Assoc & the Mechancl CNTRCTRS Asso | Community improvement and capacity building | 501(c)(6) | 1944 | $1.7 million | $3.1 million | 2025-08 |
| Inland Fair Housing and Mediation Board | Crime and legal-related | 501(c)(3) | 1987 | $1.6 million | $1.6 million | 2025-06 |
| Orion Schools | Education | 501(c)(3) | 2015 | $1.6 million | $86,239 | 2025-06 |
| Southern California Section of Pga | 501(c)(6) | 1983 | $1.6 million | $14.5 million | 2024-12 | |
| Unidos Por La Musica | Human services | 501(c)(3) | 2011 | $1.4 million | $824,296 | 2025-12 |
| Ontario Professional Firefighters Local 1430 Retiree Healthcare Savi | Mutual and membership benefit | 501(c)(9) | 2017 | $1.4 million | $11.1 million | 2025-12 |
| New Creation Behavioral Healthcare Foundation | Mental health and crisis intervention | 501(c)(3) | 2015 | $1.2 million | $450,476 | 2024-12 |
| Major Arena Soccer League | 501(c)(6) | 2017 | $1.1 million | $133,236 | 2025-04 | |
| Summer Place Inc | Human services | 501(c)(3) | 1992 | $1.1 million | $1.8 million | 2025-12 |
| United Food and Commercial Workers International Union | 501(c)(5) | 1941 | $899,608 | $3.9 million | 2025-12 | |
| Heritage Grocers Giving Foundation | Education | 501(c)(3) | 2007 | $773,670 | $769,332 | 2024-12 |
| Ontario Police Officers Association Incorporated | 501(c)(5) | 1993 | $745,218 | $1.7 million | 2025-12 | |
| Club West Sports Academy Inc | Recreation and sports | 501(c)(3) | 2022 | $693,159 | $105,783 | 2024-12 |
| Milk Producers Council | 501(c)(5) | 2001 | $610,675 | $316,615 | 2024-12 | |
| All in 1 Choices Inc | Human services | 501(c)(3) | 2021 | $588,748 | $41,363 | 2024-12 |
| Richard Myles Johnson Foundation | Education | 501(c)(3) | 1966 | $574,248 | $828,379 | 2025-09 |
| West Coast Percussion Alliance | Arts, culture and humanities | 501(c)(3) | 2009 | $514,847 | $234,847 | 2025-05 |
| Millwright Labor-Management Cooperation Committee | Mutual and membership benefit | 501(c)(6) | 2014 | $509,799 | $1.8 million | 2025-12 |
| International Water Initiative for Sanitation and Hygiene Inc | Environment | 501(c)(3) | 2017 | $492,691 | $302,934 | 2025-12 |
| Ie Ceem Incorporated | Education | 501(c)(3) | 2019 | $486,476 | $14,380 | 2025-12 |
| Downtown Ontario Improvement Association | Community improvement and capacity building | 501(c)(3) | 2020 | $481,757 | $489,083 | 2025-11 |
| Huerta Del Valle | Food, agriculture and nutrition | 501(c)(3) | 2014 | $455,615 | $312,500 | 2025-06 |
| Benevolent & Protective Order of Elks of the USA | 501(c)(8) | 1951 | $434,090 | $763,580 | 2026-03 | |
| Nevada Credit Union League Inc | 501(c)(6) | 1970 | $395,097 | $926,259 | 2024-12 | |
| Above the Rest Academy | Human services | 501(c)(3) | 2021 | $389,261 | $321,847 | 2025-12 |
| International Serum Industry Association | Community improvement and capacity building | 501(c)(6) | 2007 | $387,778 | $340,254 | 2025-06 |
| Malo Motivating Action Leadership Opportunity | Arts, culture and humanities | 501(c)(3) | 2018 | $376,017 | $550,677 | 2024-12 |
| Ontario Christian School Foundation | 501(c)(3) | 1968 | $373,088 | $4.1 million | 2024-09 | |
| American Legion | 501(c)(19) | 1946 | $358,705 | $1.9 million | 2024-06 | |
| Ontario Chamber of Commerce | 501(c)(6) | 1961 | $346,764 | $15,559 | 2025-06 | |
| Frontsight Military Ministry | Human services | 501(c)(3) | 2015 | $292,925 | $54,022 | 2025-12 |
| Chaffey High School Alumni Association | 501(c)(3) | 1993 | $288,737 | $657,566 | 2025-12 | |
| Ontario Montclair Teachers Association | 501(c)(5) | 1968 | $281,260 | $525,904 | 2025-08 | |
| California Teachers Association | 501(c)(5) | 1977 | $272,480 | $370,615 | 2025-08 | |
| Hope Reigns Charity Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2014 | $264,052 | $147,899 | 2025-06 |
| American Flying Tigers Legacy Foundation | Animal-related | 501(c)(3) | 2025 | $250,000 | $30,770 | 2025-12 |
| Parent Booster USA Inc | Education | 501(c)(3) | 2005 | $248,822 | $80,176 | 2026-06 |
| Jenneh Farms | Human services | 501(c)(3) | 2020 | $231,527 | $499,722 | 2024-12 |
| Arcadian Shores Manor | 501(c)(3) | 1989 | $216,393 | $24,576 | 2024-12 | |
| Ontario Fastpitch Softball Association | Recreation and sports | 501(c)(3) | 2019 | $198,365 | $21,591 | 2025-06 |
| Ontario Professional Firefighters Foundation | Employment | 501(c)(3) | 2023 | $195,740 | $197,918 | 2025-06 |
| Onlone Tribe of Carmel First Settlers of Chino Valley C | Community improvement and capacity building | 501(c)(3) | 2023 | $189,933 | $100 | 2025-12 |
| Dream Builders Inc | Youth development | 501(c)(3) | 1999 | $188,932 | $120,062 | 2025-06 |
| Route 66 Reunion | Recreation and sports | 501(c)(3) | 2014 | $186,620 | $20,907 | 2025-06 |
| Dignity Group | Health care | 501(c)(3) | 2010 | $180,291 | $278,773 | 2025-12 |
| Mt Zion Baptist Church | Religion-related | 501(c)(3) | 2021 | $170,264 | $5,741 | 2023-12 |
| Shops at Dos Lagos Foundation | Human services | 501(c)(3) | 2022 | $168,311 | $28,591 | 2025-12 |
| Chaffey Community Art Association | 501(c)(3) | 1966 | $160,214 | $97,895 | 2026-06 | |
| Ontario Police Management Group Inc | 501(c)(5) | 1997 | $154,646 | $436,193 | 2025-12 | |
| Little League Baseball Inc | 501(c)(3) | 1967 | $154,092 | $90,996 | 2025-09 | |
| Western San Bernardino County Bar Association | 501(c)(6) | 1989 | $153,214 | $48,351 | 2025-12 | |
| Inland Valley Soccer League Inc | Recreation and sports | 501(c)(3) | 2015 | $152,023 | $3,522 | 2025-12 |
| Southern California Residential Drywall Contract Adm Comm Inc | 501(c)(5) | 1993 | $145,860 | $2.8 million | 2025-12 | |
| International Union United Auto Aerospace & Agricultural Workers | 501(c)(6) | 1941 | $141,110 | $134,544 | 2025-12 | |
| Hidden Truths Project Inc | Human services | 501(c)(3) | 2024 | $132,793 | $181,791 | 2025-12 |
| Hosanna International Festivalsfoundation | Recreation and sports | 501(c)(3) | 2007 | $131,783 | $1,405 | 2024-12 |
| Inland Christian Home Foundation Inc | Human services | 501(c)(3) | 1992 | $130,056 | $3 million | 2025-12 |
| Hua Xia Evangelical Seminary | Education | 501(c)(3) | 2022 | $128,020 | $264,670 | 2025-12 |
| Celtic Soccer League | Recreation and sports | 501(c)(3) | 2024 | $122,864 | $101,131 | 2025-12 |
| Chinese American Ceo Organization | Community improvement and capacity building | 501(c)(6) | 2001 | $114,195 | $402,334 | 2025-12 |
| Mt Zion Christian School | Education | 501(c)(3) | 2025 | $107,319 | $1,063 | 2021-12 |
| National Association of Letter Carriers | 501(c)(5) | 1944 | $97,407 | $119,203 | 2025-12 | |
| Society for Vector Ecology | Environment | 501(c)(3) | 1991 | $95,951 | $482,846 | 2025-12 |
| Truth in Love Ministry Inc | Religion-related | 501(c)(3) | 2007 | $95,337 | $62,427 | 2025-12 |
| Touch Ones United Creating Hope Inc | Food, agriculture and nutrition | 501(c)(3) | 2017 | $94,482 | $23,310 | 2025-12 |
| El Santuario Inc | Religion-related | 501(c)(3) | 1997 | $92,866 | $44,878 | 2021-12 |
| Southern California Agricultural Land Foundation | Food, agriculture and nutrition | 501(c)(3) | 2012 | $92,833 | $146,298 | 2024-12 |
| Iglesia La Nueva Getsemani | Religion-related | 501(c)(3) | 2015 | $92,728 | $398,073 | 2025-12 |
| Travelers Aid of the Inland Empire | Human services | 501(c)(3) | 1992 | $80,215 | $93,580 | 2025-06 |
| Park View Elementary School Pto | Education | 501(c)(3) | 2025 | $73,996 | $28,401 | 2026-06 |
| Arts Area | Arts, culture and humanities | 501(c)(3) | 2018 | $73,957 | $126,653 | 2025-06 |
| Inland Empire Economic Partnership Foundation | Community improvement and capacity building | 501(c)(3) | 1997 | $72,112 | $750,199 | 2024-12 |
| Game Changers Leadership Institute | Education | 501(c)(3) | 2023 | $71,403 | $59,035 | 2024-12 |
| Mountain View Elementary School Parent Teacher Organization | Education | 501(c)(3) | 2023 | $66,700 | $35,336 | 2025-12 |
| Fundacion Ministerio Pentecostes Vida de Cristo | Religion-related | 501(c)(3) | 2017 | $66,695 | $3,539 | 2022-12 |
| California Alliance for Golf | Community improvement and capacity building | 501(c)(6) | 2013 | $65,014 | $65,155 | 2024-12 |
| United Food and Commercial Workers International Union | 501(c)(5) | 1941 | $64,317 | $157,187 | 2026-06 | |
| Masonic Hall Association of Ontario | 501(c)(8) | 1922 | $63,391 | $426,995 | 2025-12 | |
| Edison Academy Pto | Education | 501(c)(3) | 2021 | $61,209 | $3,527 | 2026-06 |
| Calcs Group | Diseases, disorders and medical disciplines | 501(c)(3) | 2018 | $56,550 | $65,309 | 2025-12 |
| Empowerment 4 Generations Inc | Education | 501(c)(3) | 2020 | $55,100 | $55,100 | 2023-12 |
| California Optometric Association | 501(c)(6) | 1966 | $54,576 | $106,058 | 2025-12 | |
| M I Part-Nors Financial Services | Community improvement and capacity building | 501(c)(3) | 2017 | $52,415 | $392,854 | 2023-12 |
| Iglesia Del Dios Vivo Los Llamados de Mi Nombre | Religion-related | 501(c)(3) | 2014 | $51,924 | $55,695 | 2025-12 |
| Bless and Be Blessed Inc | Human services | 501(c)(3) | 2014 | $48,650 | $125,093 | 2025-12 |
| Ontario Lodge No 345 of the Independent Order of Odd Fellows | Mutual and membership benefit | 501(c)(8) | 2021 | $46,231 | $319,253 | 2024-12 |
| Care Advocates Inc | Human services | 501(c)(3) | 2017 | $46,067 | $7 | 2025-03 |
| Ibanag Community Foundation Inc | Arts, culture and humanities | 501(c)(3) | 2023 | $46,047 | $18,939 | 2024-12 |
| Center of Christ Ministries | Religion-related | 501(c)(3) | 1999 | $44,604 | $0 | 2021-12 |
| Pta California Congress of Parents Teachers & Students Inc | 501(c)(3) | 1943 | $43,857 | $30,074 | 2023-06 | |
| Pta California Congress of Parents Teachers & Students Inc | 501(c)(3) | 1943 | $43,812 | $36,695 | 2025-06 | |
| Liberty Elementary Pto | Education | 501(c)(3) | 2014 | $40,240 | $15,984 | 2025-06 |
| Pasadena Area Opera Trust | Arts, culture and humanities | 501(c)(3) | 1973 | $37,633 | $457,428 | 2025-09 |
| Swaralaya | Arts, culture and humanities | 501(c)(3) | 2021 | $36,151 | $1 | 2025-12 |
| Promoters for Better Health | Health care | 501(c)(3) | 2019 | $35,146 | $9,795 | 2023-12 |
| Iron Workers Local Union No 844 | Employment | 501(c)(5) | 2005 | $34,796 | $749,609 | 2025-06 |
| Call for the Wild Foundation | Animal-related | 501(c)(3) | 2023 | $32,526 | $54,326 | 2024-12 |
| Garnier Foundation Inc | Human services | 501(c)(3) | 2022 | $30,146 | $1,416 | 2022-12 |
| West End Executives Association Inc | 501(c)(6) | 1989 | $28,336 | $17,573 | 2025-12 | |
| Knights of Columbus | 501(c)(8) | 1940 | $21,760 | $98,464 | 2025-12 | |
| Levi H Dickey Elementary School Pto | Education | 501(c)(3) | 2019 | $21,422 | $7,816 | 2025-06 |
| Adonai Agape Mission Inc | International, foreign affairs and national security | 501(c)(3) | 2009 | $16,275 | $26,400 | 2024-12 |
| Christmas On Euclid A California Non-Profit Corporation | Religion-related | 501(c)(3) | 2014 | $16,116 | $2,400 | 2025-06 |
| Club Juvenil Soccer Organization | Recreation and sports | 501(c)(3) | 2016 | $11,981 | $50 | 2023-12 |
| Construction Financial Management Association | 501(c)(6) | 1986 | $11,339 | $231,445 | 2025-03 | |
| Lionsberg Inc | Human services | 501(c)(3) | 2020 | $9,014 | $18,648 | 2024-12 |
| Casa Misionera Jesucristo Es La Salvacion Y La Vida Eterna | Human services | 501(c)(3) | 2015 | $5,995 | $1 | 2025-12 |
| Museum of History and Art Ontario Associates | Arts, culture and humanities | 501(c)(3) | 2025 | $5,354 | $102,779 | 2025-06 |
| Cal Chiefs Ems Section South | Public and societal benefit | 501(c)(3) | 2023 | $4,700 | $7,019 | 2025-12 |
| West End Family Counseling Service Foundation Inc | 501(c)(3) | 1993 | $400 | $174,229 | 2025-06 | |
| 2 Autism Moms | Human services | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| 66 Music Foundation | Arts, culture and humanities | 501(c)(3) | 2025 | $0 | $1 | 2024-12 |
| A Firm Foundation Christian Fellowship | Religion-related | 501(c)(3) | 1999 | |||
| A Hand To Humanity Association | Human services | 501(c)(3) | 2025 | |||
| Abba Father Ministries | Religion-related | 501(c)(3) | 2010 | |||
| Abiding Word Faith Ministries | 501(c)(3) | 1992 | ||||
| Academy for Youth Education | Education | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Adrians World | Health care | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| Advocates for Medical Expansion Inc | Health care | 501(c)(3) | 2025 | |||
| Advocates for Mobility Solutions Through Home Renovations Inc | Health care | 501(c)(3) | 2025 | |||
| Aktiva Nutrition & Prevention Hub | Health care | 501(c)(3) | 2022 | $0 | $1 | 2022-12 |
| Alice Colby Wheeler Scholarship Fund 1020003308 | Education | 501(c)(3) | 1974 | $613,850 | 2025-12 | |
| All American Motorsports Foundation | Recreation and sports | 501(c)(3) | 2010 | $0 | $0 | 2025-12 |
| All By Him International | Religion-related | 501(c)(3) | 2015 | $0 | $0 | 2025-12 |
| Alliance Church of Ontario | 501(c)(3) | 1972 | ||||
| Altar of Prayer Church | 501(c)(3) | 1964 | ||||
| Amazing Renaissance | Religion-related | 501(c)(3) | 2024 | $0 | $0 | 2025-06 |
| Amazing Stars Shining Bright | Public and societal benefit | 501(c)(3) | 2018 | $0 | $0 | 2025-05 |
| American Buddhism Temple | Human services | 501(c)(3) | 2024 | $0 | $0 | 2024-12 |
| American Federation of State County & Municipal Employees | 501(c)(5) | 1957 | $0 | $0 | 2025-12 | |
| American International Anti-Aging Medical Council | Human services | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| American Oriental Culture | 501(c)(3) | 1985 | $1 | 2026-03 | ||
| American Youth Obesity Research & Prevention Foundation | Medical research | 501(c)(3) | 2013 | $0 | $2,119 | 2025-09 |
| Amistad Cristiana | Religion-related | 501(c)(3) | 2007 | |||
| Andrew D Hernandez Jr Foundation | Arts, culture and humanities | 501(c)(3) | 2024 | |||
| Andrew Winfield Richards Foundation | Education | 501(c)(3) | 1997 | $364,733 | 2024-12 | |
| Archetype Pattern Workshop | Religion-related | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Art and Science Cultural Center | Arts, culture and humanities | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| Artcentrik Inc | Arts, culture and humanities | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| Asambleas Unidas de Dios Inc | Religion-related | 501(c)(3) | 2019 | |||
| Ask Our Pastor | Community improvement and capacity building | 501(c)(3) | 2023 | $0 | $0 | 2024-01 |
| Asociacion de Clubes Jaliscienses de California | Arts, culture and humanities | 501(c)(3) | 2018 | $0 | $0 | 2025-12 |
| Associated Mountain View Teachers | Mutual and membership benefit | 501(c)(5) | 2015 | $0 | $0 | 2025-06 |
| Authentic Worship Church | 501(c)(3) | 2025 | ||||
| BCC Life Changing Ministries Inc | 501(c)(3) | 1989 | ||||
| Bahais of Ontario | 501(c)(3) | 1965 | ||||
| Baiyun Taoism Foundation | Education | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Baldy View Rop Foundation | Education | 501(c)(3) | 1995 | $0 | $0 | 2026-06 |
| Ball Players Care Inc | Housing and shelter | 501(c)(3) | 2024 | |||
| Bangladeshi Community of Inland Empire Corporation | Arts, culture and humanities | 501(c)(3) | 2023 | $0 | $0 | 2026-01 |
| Banner of Love | Public and societal benefit | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Baptist Church Pioneer Free Will | 501(c)(3) | 1974 | ||||
| Be-Ending Inc | Human services | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Beards for Change Inc | Community improvement and capacity building | 501(c)(3) | 2025 | |||
| Beauty for Ashes | Crime and legal-related | 501(c)(3) | 2008 | $0 | $0 | 2023-12 |
| Bella and Sunshine Rescue Inc | Animal-related | 501(c)(3) | 2022 | $0 | $0 | 2024-12 |
| Bethany Cambodian Evangelical Church of Christian and Missionary | 501(c)(3) | 1972 | ||||
| Bethel Cambodian Evangelical Church | 501(c)(3) | 1972 | ||||
| Beyond the Rim Impact | Youth development | 501(c)(3) | 2025 | |||
| Bible Baptist Church International | 501(c)(3) | 1965 | ||||
| Born To Win Athlete Development Pathway Inc | Recreation and sports | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Cabd S Foundation Inc | Food, agriculture and nutrition | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Caceo Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2026 | |||
| California Council On Gerontology and Geriatrics | 501(c)(3) | 1982 | $0 | $0 | 2025-12 | |
| California Federation of Womens Clubs | 501(c)(3) | 1998 | $0 | $0 | 2023-05 | |
| California Kachin Baptist Church Corporation | Religion-related | 501(c)(3) | 2025 | |||
| Calvary Chapel Creekside Inc | Religion-related | 501(c)(3) | 2005 | |||
| Calvary Chapel of Chino | 501(c)(3) | 1980 | ||||
| Camalaniugan Circle USA | Health care | 501(c)(3) | 2009 | $0 | $0 | 2025-05 |
| Camalaniugan National High School Alumni Association International | Education | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Cambodian Evangelical Church Dist of the Christian and Missionary | 501(c)(3) | 1972 | ||||
| Carexchange | Health care | 501(c)(3) | 2025 | |||
| Cat Advocacy Team | Animal-related | 501(c)(3) | 2026 | |||
| Center for Modern China Studies Inc | International, foreign affairs and national security | 501(c)(3) | 2010 | $0 | $0 | 2025-12 |
| Centro Cristiano Familiar | 501(c)(3) | 1964 | ||||
| Charlees Angels Inc | Youth development | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Childrens Hospital Inland Empire Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2024 | |||
| Chinese American Research and Education Association | Education | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| Christ Chapel-Prophet of Joy | Religion-related | 501(c)(3) | 2019 | |||
| Christ Embassy Southbay | Religion-related | 501(c)(3) | 2026 | |||
| Christ in Me Christian Fellowship Inc | Religion-related | 501(c)(3) | 2015 | |||
| Christian Business Ministries | 501(c)(3) | 1990 | $5,250 | 2025-12 | ||
| Christian Chapel of Ontario | 501(c)(3) | 1986 | ||||
| Christian Education Advice Center | Religion-related | 501(c)(3) | 2019 | $0 | $0 | 2023-12 |
| Christian Fellowship and Ministry Inc | 501(c)(3) | 1977 | ||||
| Christian International Embassy Ministries | 501(c)(3) | 1964 | ||||
| Christians in Service To Others Cisto | Religion-related | 501(c)(3) | 2014 | $0 | $0 | 2025-10 |
| Christs Chapel Reformed Episcopal Church | Religion-related | 501(c)(3) | 2024 | |||
| Church in the Valley Diamond Bar | Religion-related | 501(c)(3) | 1996 | |||
| Church of God of Prophecy | 501(c)(3) | 1969 | ||||
| Church of God of Prophecy | 501(c)(3) | 1969 | ||||
| Citychurch International Inc | Religion-related | 501(c)(3) | 2003 | |||
| Cleaning With My Heart Foundation | Human services | 501(c)(3) | 2026 | |||
| Cleanse | Human services | 501(c)(3) | 2025 | $0 | $0 | 2024-12 |
| Cleer-II | Environment | 501(c)(3) | 2026 | $0 | $12,379 | 2025-12 |
| Collective Rhythm Outreach | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2025 | $0 | $0 | 2025-11 |
| Colony HS Volleyball Booster Club | Recreation and sports | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Colony Softball Booster | Recreation and sports | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Colony Titans Baseball Booster Club | Recreation and sports | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Columbiettes Incorporated | 501(c)(10) | 1977 | $0 | $0 | 2025-08 | |
| Community Baptist Church of Ontario Calif | 501(c)(3) | 1961 | ||||
| Community Bible Church of Ontario | 501(c)(3) | 1979 | ||||
| Continuing the Dream | Mutual and membership benefit | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Council of Reformed Charities | 501(c)(3) | 1989 | $0 | $0 | 2025-05 | |
| Covenant Word Worship Center | Religion-related | 501(c)(3) | 2023 | |||
| Creek View Elementary Pto | Education | 501(c)(3) | 2025 | |||
| Crisis Investigation Inc | 501(c)(3) | 1983 | ||||
| Cristo Rey Ontario Inc | Religion-related | 501(c)(3) | 2020 | |||
| Cross Walk Christian Church | Religion-related | 501(c)(3) | 2004 | |||
| D Andre D Lampkin Foundation | Human services | 501(c)(3) | 2017 | $0 | $0 | 2025-12 |
| D K Kim Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2003 | $1.3 million | 2024-12 | |
| DCC Climbing Gym Inc | Recreation and sports | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| David Pentecost Outreach | Religion-related | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Devar Shalom Word of Peace Ministries | Religion-related | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Dhammacakratra Buddhist Community Center Inc | Religion-related | 501(c)(3) | 2006 | |||
| E Dist Union of the Ca-Pac Annual Conf of the United Methodist Churc | 501(c)(3) | 1973 | ||||
| Echos of Faith Revivals Inc | 501(c)(3) | 1972 | 2010-12 | |||
| Educated Child Inc | Education | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| El Aposento Alto PHC | 501(c)(3) | 1964 | ||||
| El Prado Golf Courses Foundation Co RP | Recreation and sports | 501(c)(3) | 2026 | |||
| Embajadores de Cristo | 501(c)(3) | 1963 | ||||
| Embassy Kofg Training Center Inc | Religion-related | 501(c)(3) | 2024 | |||
| Empowering Our Community | Human services | 501(c)(3) | 2020 | $0 | $0 | 2024-12 |
| End Time Harvest International Inc | Religion-related | 501(c)(3) | 2002 | |||
| Entrepreneur Ecosystem | Education | 501(c)(3) | 2024 | |||
| Esmar Community Development | Employment | 501(c)(3) | 2020 | $0 | $0 | 2023-12 |
| Eternal Dreamer Foundation | Education | 501(c)(3) | 2026 | $0 | $0 | 2025-12 |
| Ethnos Research Inc | Education | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| Evangelical Free Church of Ontario | 501(c)(3) | 1982 | ||||
| Ez Care Link Foundation | Health care | 501(c)(3) | 2023 | $1 | 2023-12 | |
| FM Ministries | Arts, culture and humanities | 501(c)(3) | 2026 | |||
| Faith Alive | 501(c)(3) | 1959 | ||||
| Family Motor Coach Association | 501(c)(7) | 1975 | $0 | $0 | 2025-12 | |
| Financial Community Education Foundation | Education | 501(c)(3) | 2018 | $0 | $0 | 2025-12 |
| First Christian Church | 501(c)(3) | 1951 | ||||
| First Church of Christ Scientist of Ontario | 501(c)(3) | 1988 | ||||
| First Samoan Ag Pomona | 501(c)(3) | 1964 | ||||
| Fortress International Christianworship Center Inc | Religion-related | 501(c)(3) | 1964 | |||
| Fraternal Order of Eagles | Mutual and membership benefit | 501(c)(8) | 2024 | $0 | $0 | 2025-05 |
| Free & Accepted Masons of California | 501(c)(10) | 1940 | $0 | $0 | 2025-12 | |
| Free Magyar Reformed Church of Ontario | 501(c)(3) | 1967 | ||||
| Freeway Church Inc | 501(c)(3) | 1992 | ||||
| Friends Giving Back | Education | 501(c)(3) | 2025 | |||
| Friends of Arab Christians Ministry | Religion-related | 501(c)(3) | 2026 | |||
| Friends of Ontario City Library Inc | 501(c)(3) | 1974 | $0 | $0 | 2025-12 | |
| Friends of the Ontario Chaffey Community Show Band | Arts, culture and humanities | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Friendship Missionary Baptist Church | 501(c)(3) | 1971 | ||||
| Fuerst Family Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2022 | $289,220 | 2024-12 | |
| Galaxy Schutzhund Club Inc | Animal-related | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Garageland Media Foundation | Arts, culture and humanities | 501(c)(3) | 2025 | |||
| Gateway Seminary of the Southern Baptist Convention | 501(c)(3) | 1964 | ||||
| Global Mission Church of Southern California | Religion-related | 501(c)(3) | 2024 | |||
| Goal Achiever Charitable Organization Inc | Education | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| God Is For-Giving Inc | Religion-related | 501(c)(3) | 2024 | $0 | $0 | 2024-12 |
| Goddybriggs Christian Charitable Foundation | Religion-related | 501(c)(3) | 2024 | |||
| Gods Will Alliance Church | 501(c)(3) | 1972 | ||||
| Golden Gate Baptist Theological Seminary Housing & Development Cor | 501(c)(3) | 1986 | $0 | $0 | 2025-07 | |
| Grace Family Church Inc | Religion-related | 501(c)(3) | 2022 | |||
| Grace Yokley Middle School Pto | Education | 501(c)(3) | 2023 | $0 | $0 | 2025-06 |
| Grandcrest Legacy Foundation | Human services | 501(c)(3) | 2025 | |||
| Green 4 Better | Environment | 501(c)(3) | 2026 | $0 | $0 | 2025-12 |
| Green Industry Hall of Fame | Arts, culture and humanities | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| HHMC Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2021 | $463,380 | 2025-12 | |
| HMC Designing Futures Foundation | Education | 501(c)(3) | 2009 | $1.7 million | 2024-12 | |
| Happiness of Pursuit Arts Foundation | Arts, culture and humanities | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Harvest Chinese Christian Church East La | Religion-related | 501(c)(3) | 2015 | |||
| Harvest Citadel Christian Fellowship | Religion-related | 501(c)(3) | 1999 | |||
| Harvest Light Community Church Inc | 501(c)(3) | 1990 | ||||
| Helping Tibet Foundation Inc | International, foreign affairs and national security | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Home of Christians Bethel Church | Religion-related | 501(c)(3) | 2002 | 2025-12 | ||
| Hometeam Inc | Youth development | 501(c)(3) | 2018 | $0 | $0 | 2025-12 |
| Hope Bridge Love Mission | Public and societal benefit | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Hope for Life Pantry | Human services | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| I Am Ministries | Religion-related | 501(c)(3) | 1999 | |||
| I D A Y Dream-Developing Aspired Youth | Youth development | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| Ie Moves | Public and societal benefit | 501(c)(4) | 2025 | |||
| Ie Routes | Recreation and sports | 501(c)(3) | 2026 | |||
| Iglesia Apostolica Profetica | Religion-related | 501(c)(3) | 2022 | |||
| Iglesia Bautista Betel | 501(c)(3) | 1955 | ||||
| Iglesia Cristiana Getsemani de Ad | 501(c)(3) | 1968 | ||||
| Iglesia Cristiana Gracia Soberana | Religion-related | 501(c)(3) | 2013 | |||
| Iglesia Evangelica de Restauracion Inc Mision Cristiana Elim U S A | Religion-related | 501(c)(3) | 2007 | $0 | $0 | 2024-12 |
| Iglesia Impacto de Amor Inc | Religion-related | 501(c)(3) | 2018 | |||
| Iglesia Internacional Nueva Vida-Ontario | Religion-related | 501(c)(3) | 2011 | |||
| Iglesia La Senda Antigua Pomona | Religion-related | 501(c)(3) | 2003 | |||
| Iglesia Pentecostal Ministerios Lluvias de Gracia | Religion-related | 501(c)(3) | 2022 | |||
| Iglesia Pentecostes Celestial Inc | Religion-related | 501(c)(3) | 2016 | |||
| Iglesia Rios de Agua Viva Int | Religion-related | 501(c)(3) | 2018 | |||
| Iglesia de Cristo Peniel | Religion-related | 501(c)(3) | 2005 | |||
| Independencia Soccer League | Recreation and sports | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Inland Empire Chapter - Association of Certified Fraud Examiners | Mutual and membership benefit | 501(c)(6) | 2010 | $0 | $0 | 2025-12 |
| Inland Smyrna Korean Church | 501(c)(3) | 1993 | ||||
| Inland Valley Uplift Foundation | Education | 501(c)(3) | 2006 | $0 | $0 | 2024-12 |
| Inland Young Nak Presbyterian Church | Religion-related | 501(c)(3) | 2006 | |||
| Inner Vision Ministry | Religion-related | 501(c)(3) | 2001 | |||
| Inspire International Ministries | Religion-related | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Inspired Voices Inc | Education | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| International Association of Lions Clubs | 501(c)(4) | 1940 | $0 | $0 | 2025-06 | |
| International Institute of Arc Theory | Science and technology | 501(c)(3) | 2011 | $0 | $0 | 2025-12 |
| International Tiberias Church | 501(c)(3) | 1964 | ||||
| Jack and Jill Learning and Development Center | Human services | 501(c)(3) | 2017 | $0 | $0 | 2024-12 |
| Jenneh Foundation | International, foreign affairs and national security | 501(c)(3) | 2013 | $264 | 2024-12 | |
| Jesus Alive Ministries | Religion-related | 501(c)(3) | 2016 | |||
| John Jack Pick Trust 1015028906 | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2008 | $1.3 million | 2025-12 | |
| John P Previti Memorial Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2011 | $35,067 | 2025-06 | |
| Joseph Bailey Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2002 | $5.4 million | 2025-12 | |
| Joy City | Religion-related | 501(c)(3) | 1997 | |||
| Joyful Korean Southern Baptist Church | Religion-related | 501(c)(3) | 2004 | |||
| Joyful Nations Ministries | Religion-related | 501(c)(3) | 2003 | |||
| Kastles4hope | Human services | 501(c)(3) | 2024 | |||
| Khalid E Parekh Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2025 | $739,253 | 2024-12 | |
| Khloe Kares | Human services | 501(c)(3) | 2017 | $0 | $0 | 2025-12 |
| Kingdom Arrows Academy | Youth development | 501(c)(3) | 2026 | |||
| Kingdom Generation International | Religion-related | 501(c)(3) | 2011 | |||
| Kings Church of Ontario | Religion-related | 501(c)(3) | 2023 | |||
| Kinijit Los Angeles Support Anddevelopment Association for | International, foreign affairs and national security | 501(c)(3) | 2010 | $0 | $0 | 2024-12 |
| Kiwanis Club of Ontario California Foundation | Community improvement and capacity building | 501(c)(3) | 2014 | $0 | $0 | 2025-09 |
| Kiwanis International Inc | 501(c)(4) | 1960 | $0 | $0 | 2025-09 | |
| Knights of Columbus | 501(c)(8) | 1940 | $0 | $0 | 2026-03 | |
| Korean Shofar Drum Ministry | Religion-related | 501(c)(3) | 2018 | $0 | $0 | 2024-12 |
| La Cruz de Jesus de Las Asambleas de Dios | 501(c)(3) | 1964 | ||||
| La Cruz de Jesus de Las Asambleas de Dios | 501(c)(3) | 1964 | ||||
| La Verne Symphony Orchestra Inc | Arts, culture and humanities | 501(c)(3) | 2026 | |||
| Latino Peace Officers Accociation Inland Empire Chapter Ca Inc | Youth development | 501(c)(3) | 2015 | $0 | $0 | 2024-12 |
| Laylas Heart Foundation | Human services | 501(c)(3) | 2026 | |||
| Learning Assistance for Muslim Progression | Education | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Legends Fairy Inc | Human services | 501(c)(3) | 2025 | |||
| Lester B Millard Testamentary Trust | 501(c)(3) | 1963 | $1.8 million | 2025-12 | ||
| Liberty International Ministries | Religion-related | 501(c)(3) | 1964 | |||
| Life Lessons Learned | Human services | 501(c)(3) | 2017 | $0 | $0 | 2025-12 |
| Lifehouse Ministries Inc | Religion-related | 501(c)(3) | 2002 | |||
| Lights of Love Foundation | Arts, culture and humanities | 501(c)(3) | 2022 | $0 | $0 | 2024-10 |
| Little Ark Foundation | Human services | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Liv-In Christ Witness Christian Center | 501(c)(3) | 1985 | ||||
| Los Angeles Grace Lions Club Inc | Human services | 501(c)(3) | 1940 | $0 | $0 | 2025-12 |
| Love Hope & Friendship Ministry Inc | Religion-related | 501(c)(3) | 2024 | $0 | $0 | 2025-05 |
| Lutheran Church Missouri Synod | 501(c)(3) | 1941 | ||||
| Malaney Gordon Foundation | Public safety, disaster preparedness and relief | 501(c)(3) | 2024 | $1 | 2025-12 | |
| Mamysh Inc | Human services | 501(c)(3) | 2011 | $0 | $0 | 2025-12 |
| Manna 4 All Corp | Food, agriculture and nutrition | 501(c)(3) | 2025 | |||
| Mark H & Blanche M Harrington Foundation | 501(c)(3) | 1958 | $19.4 million | 2025-12 | ||
| Marsell Wellness Center | Mental health and crisis intervention | 501(c)(3) | 2024 | $0 | $1 | 2024-12 |
| Matters of the Heart Inc | Human services | 501(c)(3) | 2026 | |||
| May Love Live On Inc | Mental health and crisis intervention | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Mayan Heritage Foundation Inc | Arts, culture and humanities | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Melchizedeks Excellent Minstry Order | Religion-related | 501(c)(3) | 2019 | |||
| Mental Enhancements for Neural Difficulties Services | Mental health and crisis intervention | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Meraki Now Inc | Religion-related | 501(c)(3) | 2024 | |||
| Mi Red Legal | Crime and legal-related | 501(c)(3) | 2024 | $0 | $0 | 2024-03 |
| Mighty Warriors of God Ministry Inc | Religion-related | 501(c)(3) | 1997 | |||
| Ministerio Unidos Por Cristo | Religion-related | 501(c)(3) | 2016 | |||
| Ministerios Cristianos El Shaddai | Religion-related | 501(c)(3) | 2014 | |||
| Mision El Redentor de Las Asambleas de Dios | 501(c)(3) | 1964 | ||||
| Mission BLVD Church of Christ | Religion-related | 501(c)(3) | 1998 | |||
| Mission Evangelica Pentecotes Monte de Santidad | Religion-related | 501(c)(3) | 2011 | $0 | $0 | 2024-12 |
| Missionary Church International Incoporated | 501(c)(3) | 1991 | ||||
| Modern Woodmen of America | 501(c)(8) | 1961 | $0 | $0 | 2025-12 | |
| Modern Woodmen of America | 501(c)(8) | 1961 | $0 | $0 | 2025-12 | |
| Modern Woodmen of America | 501(c)(8) | 1961 | $0 | $0 | 2025-12 | |
| Modern Woodmen of America | 501(c)(9) | 1961 | $0 | $0 | 2025-12 | |
| Modern Woodmen of America | 501(c)(8) | 1961 | $0 | $0 | 2025-12 | |
| Modern Woodmen of America | 501(c)(8) | 1961 | $0 | $0 | 2025-12 | |
| Modern Woodmen of America | 501(c)(8) | 1961 | $0 | $0 | 2025-12 | |
| Montecito Park Union Church | 501(c)(3) | 1980 | ||||
| Monumental of Faith | 501(c)(3) | 1982 | ||||
| Mountain Avenue Ag | 501(c)(3) | 1964 | ||||
| Mountain Top Worship Center | Religion-related | 501(c)(3) | 2023 | $0 | $350 | 2023-12 |
| My Fathers Glory Foundation | Education | 501(c)(3) | 2019 | $0 | $0 | 2025-06 |
| National Air Traffic Controllers Association | 501(c)(5) | 1990 | $0 | $0 | 2025-12 | |
| National Black Leadership Caucus | Civil rights, social action and advocacy | 501(c)(3) | 2018 | $0 | $0 | 2025-12 |
| New Creation Christian Fellowship | Religion-related | 501(c)(3) | 1997 | |||
| New Dimensions Community Services | Human services | 501(c)(3) | 2007 | $0 | $0 | 2024-12 |
| New Foundation in Christ Corporation | Human services | 501(c)(3) | 2025 | $0 | $0 | 2024-12 |
| New Haven Elementary Pto | Education | 501(c)(3) | 2026 | |||
| New Hope Community Church of Rancho Cucamonga | 501(c)(3) | 1992 | ||||
| New Life Evangelical Ministries | Religion-related | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| New Life Youth Foundation Inc | Youth development | 501(c)(3) | 2004 | $924,469 | 2025-12 | |
| New Start Reentry Housing | Housing and shelter | 501(c)(3) | 2025 | |||
| Next To You | Youth development | 501(c)(3) | 2024 | $0 | $0 | 2024-12 |
| North America Ai Medical Foundation | Health care | 501(c)(3) | 2024 | $0 | $0 | 2024-11 |
| Oaks Middle School Band and Auxiliaries Booster Club | Arts, culture and humanities | 501(c)(3) | 2016 | $0 | $0 | 2025-05 |
| Ontario Chamber of Commerce Foundation | Arts, culture and humanities | 501(c)(3) | 2013 | $0 | $0 | 2025-06 |
| Ontario Christian Center Where Jesus Is the Word of Life Ministry | Religion-related | 501(c)(3) | 1997 | |||
| Ontario Community Christian Church | 501(c)(3) | 1984 | ||||
| Ontario Crusaders | Recreation and sports | 501(c)(3) | 2024 | |||
| Ontario General Baptist Church | 501(c)(3) | 1966 | ||||
| Ontario Heritage | Education | 501(c)(3) | 2014 | $0 | $0 | 2025-06 |
| Ontario High School Alumni Association | Education | 501(c)(3) | 2017 | $0 | $0 | 2025-12 |
| Ontario Hispanic Chamber of Commerce | Community improvement and capacity building | 501(c)(6) | 2015 | $0 | $0 | 2025-12 |
| Ontario Hispanic Chamber of Commerce Foundation | Public and societal benefit | 501(c)(3) | 2017 | $0 | $0 | 2025-12 |
| Ontario PD B2V Mixed | Recreation and sports | 501(c)(3) | 2025 | $0 | $0 | 2025-06 |
| Ontario Police Explorer Program Inc | Youth development | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Ontario Police Officers Association Widows and Orphans Fund | 501(c)(3) | 2005 | $0 | $0 | 2025-12 | |
| Ontario Police Peer Support Foundation Inc | Mental health and crisis intervention | 501(c)(3) | 2025 | $0 | $0 | 2025-07 |
| Ontario South Foursquare Church | 501(c)(3) | 1949 | ||||
| Ontario Unit No 112 District No 25 American Legion Auxiliary | Public and societal benefit | 501(c)(19) | 2017 | $0 | $0 | 2026-06 |
| Open Arms Make A Difference | Human services | 501(c)(3) | 2014 | $0 | $1 | 2024-12 |
| Operation Homestay | Public and societal benefit | 501(c)(3) | 2026 | |||
| Operation Veterans Haven Inc | Housing and shelter | 501(c)(3) | 2026 | |||
| PPLS Youth Solutions Foundation | Public and societal benefit | 501(c)(3) | 2025 | |||
| Packed Vision Foundation | Human services | 501(c)(3) | 2024 | |||
| Palacios Community Foundation | Human services | 501(c)(3) | 2026 | |||
| Parent Booster USA Inc | 501(c)(3) | 2005 | $0 | $0 | 2025-05 | |
| Parent Booster USA Inc | Education | 501(c)(3) | 2005 | $0 | $0 | 2025-06 |
| Parent Booster USA Inc | Education | 501(c)(3) | 2005 | $0 | $0 | 2026-05 |
| Parent Booster USA Inc | Education | 501(c)(3) | 2005 | $0 | $0 | 2026-06 |
| Parent Booster USA Inc | Education | 501(c)(3) | 2005 | $0 | $0 | 2026-05 |
| Peace Cottage Incorporated | Housing and shelter | 501(c)(3) | 2022 | $0 | $0 | 2023-12 |
| Perros Boxing | Youth development | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Philanthropy Handson Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| Philippine Christian Fellowship Ontario | 501(c)(3) | 1992 | ||||
| Powerhouse Christian Center Inc | Religion-related | 501(c)(3) | 2010 | |||
| Powerhouse Est 9 5 16 | Human services | 501(c)(3) | 2018 | $0 | $0 | 2025-12 |
| Prayer and Praise Ministries Church of God in Christ | Religion-related | 501(c)(3) | 2014 | |||
| Prayers for Pets | Animal-related | 501(c)(3) | 2016 | $0 | $0 | 2023-12 |
| Prince of Peace Lutheran Church | 501(c)(3) | 1987 | ||||
| Princeton Free Will Baptist Church | 501(c)(3) | 1971 | ||||
| Pro Grow Sports Academy | Recreation and sports | 501(c)(3) | 2025 | $0 | $0 | 2024-12 |
| Project Cascarritas | Recreation and sports | 501(c)(3) | 2025 | |||
| Psycho Clown Posse | Youth development | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Pta California Congress of Parents Teachers & Students Inc | 501(c)(3) | 1943 | $0 | $0 | 2023-06 | |
| Pta California Congress of Parents Teachers & Students Inc | 501(c)(3) | 1943 | ||||
| Pta California Congress of Parents Teachers & Students Inc | 501(c)(3) | 1967 | $0 | $0 | 2025-06 | |
| Pta Congress of Parents Teachers & Students Inc | 501(c)(3) | 1943 | $0 | $0 | 2023-06 | |
| Quang Thien Buddhist Temple | Religion-related | 501(c)(3) | 2001 | |||
| Quast Family Foundation | Food, agriculture and nutrition | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Queen of Hearts Youth Services | Human services | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Raies-Murr Educational Trust 120191 | 501(c)(3) | 1993 | $2 | 2024-12 | ||
| Raise the Baar | Youth development | 501(c)(3) | 2024 | |||
| Reap What You Sew Empowerment Services Inc | Human services | 501(c)(3) | 2014 | |||
| Rental Services Industry Foundation | Community improvement and capacity building | 501(c)(3) | 1995 | $0 | $0 | 2023-08 |
| Rescue the Children of Africa | Social science | 501(c)(3) | 2021 | $0 | $0 | 2023-07 |
| Resilient Youth Sports Academy | Recreation and sports | 501(c)(3) | 2021 | $0 | $0 | 2024-12 |
| Retiree Club No 90951 | Mutual and membership benefit | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Rhema | Religion-related | 501(c)(3) | 2013 | |||
| Ride Companion Foundation | Human services | 501(c)(3) | 2026 | |||
| Robby Coachman Impact Generation Foundation | Youth development | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Rock of Faith Fellowship | 501(c)(3) | 1979 | ||||
| Rockys Rest Stop | Animal-related | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Rotary Club of Ontario Foundation | Human services | 501(c)(3) | 2011 | $0 | $0 | 2025-06 |
| Royalty Soccer | Recreation and sports | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| SDS Foundation Inc | Human services | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| SKS Park Family Foundation | Public and societal benefit | 501(c)(3) | 2023 | $0 | $244 | 2024-12 |
| STC Healing Corp | Religion-related | 501(c)(3) | 2024 | |||
| Sacred Order of St Michael and St Hilda | Religion-related | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| San Antonio Christian School | 501(c)(3) | 1947 | ||||
| San Secondo Dasti Council 12938 | Mutual and membership benefit | 501(c)(8) | 2024 | $0 | $0 | 2025-12 |
| Sano Health Arm | 501(c)(3) | 2023 | $0 | $0 | 2024-12 | |
| Santa Claus of the Chaffey District Inc | 501(c)(3) | 1960 | $0 | $0 | 2025-12 | |
| Scholarship America Inc | 501(c)(3) | 1962 | ||||
| Second Step Ministries Inc | Religion-related | 501(c)(3) | 2023 | |||
| Seeds of Hope for Veterans | Human services | 501(c)(3) | 2026 | $0 | $0 | 2025-12 |
| Shoes for Humanity Inc | Arts, culture and humanities | 501(c)(3) | 2025 | |||
| Silliman University College of Nursing Alumni Association Intl | 501(c)(3) | 2014 | $0 | $0 | 2025-12 | |
| Society for Marketing Professional Services | 501(c)(6) | 1991 | $0 | $0 | 2025-08 | |
| Soldiers for Christ Family Christian Center | 501(c)(3) | 1969 | ||||
| Sound of Dreams | Arts, culture and humanities | 501(c)(3) | 2026 | |||
| Southern California Disc Golf Association | Recreation and sports | 501(c)(4) | 1999 | $0 | $0 | 2025-12 |
| Southern California Mothers of Multiples Clubs Incorporated | Community improvement and capacity building | 501(c)(3) | 2016 | $0 | $0 | 2025-05 |
| Southland Symphony Orchestra Inc | Arts, culture and humanities | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| Sphere of Influence Church | Religion-related | 501(c)(3) | 2013 | |||
| Springlife Global Church and Ministries | Religion-related | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Sustaining Grace Ministries | Religion-related | 501(c)(3) | 2003 | |||
| Swish Society | Recreation and sports | 501(c)(3) | 2025 | |||
| Tcor Theios Divinity | Public and societal benefit | 501(c)(3) | 2015 | $0 | $0 | 2025-12 |
| Team Hustle Socal | Recreation and sports | 501(c)(3) | 2024 | |||
| Temple Sholom of Ontario | Religion-related | 501(c)(3) | 2015 | |||
| Temple of Knowledge Church | Religion-related | 501(c)(3) | 2004 | |||
| Terri Large Charitable Trust | Education | 501(c)(3) | 2015 | $30,867 | 2024-12 | |
| The Baptist Foundation Ofcalifornia | Religion-related | 501(c)(3) | 1969 | 2024-12 |
By cause in Ontario, CA
- Religion-related 95
- Human services 56
- Education 54
- Recreation and sports 28
- Arts, culture and humanities 27
- Community improvement and capacity building 17
- Youth development 17
- Philanthropy, voluntarism and grantmaking foundations 12
- Health care 11
- Public and societal benefit 11
- Mutual and membership benefit 9
- Mental health and crisis intervention 8
- Animal-related 8
- Food, agriculture and nutrition 6
- International, foreign affairs and national security 5
- Employment 5
- Environment 4
- Housing and shelter 4
- Crime and legal-related 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.