Data / Nonprofits / Oklahoma / Stillwater
Nonprofits in Stillwater, OK: 418 registered with the IRS
418 nonprofits are registered with the IRS in Stillwater, OK, 304 of them 501(c)(3) charities; the 145 that report revenue took in $501.2 million. The largest by revenue: Oklahoma State University Foundation ($272.9 million), Central Rural Electric Cooperative ($88.5 million), Cowboy Athletics Inc ($35.8 million). Most common causes: education (58), human services (27), recreation and sports (23).
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Every organization, largest by revenue first
| Organization | Category | Type | Since | Revenue | Assets | Filing |
|---|---|---|---|---|---|---|
| Oklahoma State University Foundation | Education | 501(c)(3) | 1963 | $272.9 million | $1.67 billion | 2025-06 |
| Central Rural Electric Cooperative | 501(c)(12) | 1939 | $88.5 million | $322.7 million | 2024-12 | |
| Cowboy Athletics Inc | Recreation and sports | 501(c)(3) | 2003 | $35.8 million | $71.4 million | 2024-12 |
| Stillwater Group Homes Inc | Human services | 501(c)(3) | 1984 | $5.8 million | $4.4 million | 2025-06 |
| Oklahoma State University Alumni Association | Education | 501(c)(3) | 1956 | $5.4 million | $28.6 million | 2025-06 |
| Fractionation Research Inc | 501(c)(6) | 1966 | $4.7 million | $6 million | 2025-09 | |
| Community Resourcing Incorporated | Food, agriculture and nutrition | 501(c)(3) | 2016 | $3.7 million | $4 million | 2025-12 |
| Mpower Inc | Employment | 501(c)(3) | 1971 | $3.6 million | $1.8 million | 2025-06 |
| Stillwater Medical Foundation Inc | Health care | 501(c)(3) | 1983 | $3.5 million | $14.3 million | 2024-12 |
| Foundation for the McKnight Center for the Performing Arts | Education | 501(c)(3) | 2016 | $3.4 million | $64 million | 2025-06 |
| Stillwater Country Club Inc | 501(c)(7) | 1979 | $3.4 million | $5.4 million | 2025-04 | |
| Oktep Oklahoma Tribal Engagement Partners Inc | Health care | 501(c)(3) | 2019 | $2.7 million | $383,794 | 2025-09 |
| Oklahoma Beta of Pi Beta Phi | 501(c)(7) | 1992 | $2.6 million | $19 million | 2025-08 | |
| Oklahoma Future Farmers of America Foundation Incorporated | Food, agriculture and nutrition | 501(c)(3) | 1986 | $2.5 million | $11.7 million | 2024-12 |
| Oklahoma State University Research Foundation Inc | Education | 501(c)(3) | 1969 | $2.3 million | $10.7 million | 2024-06 |
| National Wrestling Hall of Fame Inc | Arts, culture and humanities | 501(c)(3) | 1972 | $2.3 million | $9.3 million | 2024-12 |
| Oklahoma Genetics Inc | Food, agriculture and nutrition | 501(c)(5) | 2007 | $2.2 million | $2.8 million | 2026-01 |
| Payne County Youth Services Inc | Human services | 501(c)(3) | 1980 | $2 million | $1.5 million | 2025-06 |
| Alpha Omicron of Alpha Delta Pi Building Corp | 501(c)(7) | 1943 | $1.7 million | $12.8 million | 2025-06 | |
| Stillwater Domestic Violence Services Inc | Human services | 501(c)(3) | 1981 | $1.7 million | $5.6 million | 2025-06 |
| Tel Foundation | 501(c)(3) | 2014 | $1.7 million | $2.5 million | 2025-06 | |
| SMC Development Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2020 | $1.7 million | $63.2 million | 2024-12 |
| The Oklahoma 4-H Foundation Inc | Youth development | 501(c)(3) | 1962 | $1.6 million | $14.8 million | 2024-12 |
| Stillwater Chamber of Commerce | 501(c)(6) | 1938 | $1.5 million | $4.3 million | 2025-12 | |
| United Way of Payne County Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 1955 | $1.4 million | $2.3 million | 2025-12 |
| Stillwater Christian School Inc | Education | 501(c)(3) | 2004 | $1.3 million | $992,067 | 2025-06 |
| Alpha Chi Omega Fraternity Inc | 501(c)(7) | 1941 | $1.3 million | $506,150 | 2025-07 | |
| Gamma Phi Beta Sorority Inc | 501(c)(7) | 1940 | $1.2 million | $7.7 million | 2025-07 | |
| Visit Stillwater Inc | Community improvement and capacity building | 501(c)(6) | 2021 | $1.2 million | $870,552 | 2025-06 |
| Chi Omega Alumnae Tau Beta Chapter | 501(c)(7) | 1930 | $1.2 million | $11.4 million | 2025-06 | |
| Fifty-One East Water Inc | 501(c)(12) | 1974 | $1.2 million | $6.8 million | 2025-09 | |
| Sigma Nu Fraternity | 501(c)(7) | 1967 | $1.1 million | $33,203 | 2025-06 | |
| Kappa Delta Sorority Nu Chapter Corp Board | 501(c)(7) | 1945 | $1.1 million | $3 million | 2025-06 | |
| Future Famers of America | 501(c)(3) | 1945 | $1.1 million | $322,794 | 2025-06 | |
| Foundation for Engineering at Oklahoma State University Inc | Education | 501(c)(3) | 2009 | $1 million | $169.3 million | 2025-06 |
| Habitat for Humanity International Inc | 501(c)(3) | 1987 | $1 million | $2.5 million | 2025-06 | |
| Alpha Gamma Rho Fraternity | 501(c)(7) | 1941 | $1 million | $851,438 | 2025-07 | |
| Phi Gamma Delta Fraternity | 501(c)(7) | 1941 | $927,412 | $202,485 | 2025-08 | |
| Delta Tau Delta Fraternity | 501(c)(7) | $812,752 | $161,912 | 2025-01 | ||
| Kappa Kappa Psi Fraternity | Education | 501(c)(3) | 1976 | $795,082 | $1.6 million | 2024-05 |
| SMC Equipment Inc | Housing and shelter | 501(c)(3) | 2019 | $790,869 | $21.5 million | 2024-12 |
| Oklahoma Beta Building Association of Phi Delta Theta | 501(c)(2) | 1974 | $788,998 | $1.3 million | 2025-06 | |
| Aggie RTC Wrestling | Recreation and sports | 501(c)(3) | 2023 | $772,039 | $100,229 | 2025-12 |
| Covenant Community School Inc | Education | 501(c)(3) | 2024 | $767,861 | $952,698 | 2025-06 |
| Stillwater Moh Inc | Human services | 501(c)(3) | 2020 | $751,363 | $1 million | 2025-09 |
| Payne County Drug Court Inc | Mental health and crisis intervention | 501(c)(3) | 2002 | $739,257 | $274,077 | 2025-06 |
| Future Farmers of America and Its State Associations & Local Chapter | Youth development | 501(c)(3) | 1945 | $679,095 | $147,979 | 2024-12 |
| Beta Zeta Alumnae Corporation Kappa Alpha Theta | 501(c)(7) | 1938 | $640,308 | $2 million | 2025-08 | |
| The Saville Center Inc | Human services | 501(c)(3) | 1999 | $604,195 | $934,869 | 2024-12 |
| Oklahoma Rural Rehabilitation Corporation | 501(c)(4) | 1936 | $562,585 | $10 million | 2026-06 | |
| Lost & Found Internatinal Inc | International, foreign affairs and national security | 501(c)(3) | 2009 | $540,166 | $52,105 | 2024-12 |
| Beta Theta Pi Fraternity | 501(c)(7) | 1971 | $536,859 | $6,225 | 2006-06 | |
| Stillwater Area Sports Association | Recreation and sports | 501(c)(7) | 2014 | $511,559 | $222,511 | 2025-06 |
| Tau Beta Sigma National Honorary Band Sorority | 501(c)(3) | 1976 | $506,205 | $1.2 million | 2024-05 | |
| World Harvest Stillwater | Religion-related | 501(c)(3) | 2025 | $498,758 | $2.9 million | 2024-12 |
| The Oklahoma Foundation for Career and Technology Education Inc | 501(c)(3) | 1970 | $485,141 | $2.8 million | 2025-12 | |
| Oklahoma Crop Improvement Association | 501(c)(5) | 1958 | $483,216 | $1.5 million | 2025-12 | |
| Lake McMurtry Friends Inc | Environment | 501(c)(3) | 2014 | $474,819 | $115,359 | 2025-06 |
| Chi Omega Fraternity | 501(c)(7) | 1940 | $470,999 | $328,789 | 2025-06 | |
| Oklahoma Mu Alumni Corporation | 501(c)(2) | 1958 | $470,247 | $1.2 million | 2026-06 | |
| Health Occupations Students of America | Education | 501(c)(3) | 1982 | $467,017 | $499,473 | 2025-08 |
| Gamma Zeta | Education | 501(c)(7) | 2025 | $458,171 | $1.2 million | 2024-12 |
| Stillwater Delta Tau Delta Corp | Education | 501(c)(7) | 2021 | $444,258 | $6.4 million | 2025-06 |
| Family Career and Community Leaders of America Inc | 501(c)(3) | 1946 | $422,834 | $369,250 | 2025-05 | |
| Stillwater Community Health Center Inc | Health care | 501(c)(3) | 2015 | $422,485 | $276,878 | 2025-12 |
| Living Improvement for the Elderly Center | 501(c)(3) | 1983 | $405,902 | $312,921 | 2026-06 | |
| Casa for Kids Inc | Civil rights, social action and advocacy | 501(c)(3) | 1992 | $395,663 | $506,464 | 2025-06 |
| Global Compassion Foundation | Human services | 501(c)(3) | 2011 | $367,138 | $288,571 | 2025-12 |
| Sigma Phi Epsilon Fraternity Inc | 501(c)(7) | 1941 | $364,953 | $36,398 | 2025-06 | |
| Benevolent and Protective Order of Elks | 501(c)(8) | 1951 | $363,296 | $401,863 | 2025-03 | |
| Elite Repeat Serving Stillwater Inc | Human services | 501(c)(3) | 2003 | $362,863 | $258,757 | 2025-12 |
| Alpha Gamma Rho Fraternity | 501(c)(7) | 1941 | $351,333 | $8.8 million | 2025-06 | |
| Stillwater Life Services Inc | 501(c)(3) | 1990 | $315,213 | $203,822 | 2025-12 | |
| Kappa Delta Sorority | 501(c)(7) | $285,360 | $186,680 | 2025-06 | ||
| Stillwater Board of Realtors | 501(c)(6) | 1983 | $279,479 | $332,422 | 2024-12 | |
| National Society of the Daughters of the American Revolution | Arts, culture and humanities | 501(c)(3) | 1949 | $277,661 | $1.3 million | 2025-12 |
| Stillwonder Inc | Arts, culture and humanities | 501(c)(3) | 2023 | $271,171 | $25,986 | 2025-12 |
| Tiny Paws Kitten Rescue Inc | Animal-related | 501(c)(3) | 2005 | $264,018 | $130,924 | 2024-12 |
| Technology Student Association | 501(c)(3) | 1980 | $259,661 | $89,536 | 2025-08 | |
| Stillwater Public Education Foundation | Education | 501(c)(3) | 1986 | $257,187 | $1.2 million | 2024-12 |
| The Humane Society of Stillwater Oklahoma Incorporated | Animal-related | 501(c)(3) | 1988 | $252,255 | $787,698 | 2025-12 |
| Stillwater Community Center Foundation | Recreation and sports | 501(c)(3) | 2002 | $247,956 | $415,305 | 2025-12 |
| Stillwater Soccer Association Inc | Recreation and sports | 501(c)(3) | 1998 | $247,453 | $78,999 | 2025-12 |
| Gamma Phi Beta Sorority Inc | 501(c)(7) | 1959 | $230,420 | $130,324 | 2025-07 | |
| Fairlawn Cemetery Association Inc of Stillwater Oklahoma | 501(c)(13) | 1986 | $229,321 | $668,493 | 2025-12 | |
| Court Supervision Services Inc | Crime and legal-related | 501(c)(3) | 2021 | $225,451 | $126,680 | 2025-06 |
| Eddie Sutton Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2022 | $225,361 | $328,431 | 2024-12 |
| Stillwater Lodge 2089 MSC Loyal Order of Moose | 501(c)(8) | 1935 | $221,053 | $451,194 | 2026-04 | |
| Stillwater High Student Activity Foundation Endowment | Education | 501(c)(3) | 2008 | $219,994 | $1.1 million | 2025-12 |
| Oklahoma Fccla Alumni & Associates Inc | Youth development | 501(c)(3) | 1999 | $199,742 | $373,335 | 2026-05 |
| International Assoc for Computer Information Systems | 501(c)(6) | 1970 | $194,323 | $367,330 | 2025-12 | |
| Turning Point Ranch Association | Health care | 501(c)(3) | 2012 | $175,132 | $627,215 | 2024-12 |
| Town and Gown Theatre Inc | Arts, culture and humanities | 501(c)(3) | 2015 | $173,976 | $402,308 | 2025-07 |
| Stillwater Mobile Meals | Food, agriculture and nutrition | 501(c)(3) | 1991 | $168,159 | $89,294 | 2025-12 |
| Phi Kappa Tau Fraternity | 501(c)(7) | 1967 | $167,500 | $192,222 | 2025-12 | |
| Islamic Society of Stillwater | Religion-related | 501(c)(3) | 2008 | $153,111 | $2.2 million | 2024-12 |
| Oklahoma Vocational Agricultural Teachers Association Inc | 501(c)(6) | 1986 | $147,498 | $380,462 | 2025-07 | |
| Stillwater Museum Association Inc | Arts, culture and humanities | 501(c)(3) | 1989 | $147,481 | $296,551 | 2025-12 |
| Cowboy Kids Club Inc | Recreation and sports | 501(c)(3) | 2022 | $136,302 | $19,718 | 2024-12 |
| Meridian Technology Center Foundation | 501(c)(3) | 1986 | $133,146 | $1.2 million | 2025-06 | |
| Stillwater Interfaith Counseling Center Inc | Mental health and crisis intervention | 501(c)(3) | 1999 | $132,342 | $29,433 | 2025-12 |
| Central Plains Dressage Society Inc | Animal-related | 501(c)(3) | 2018 | $129,235 | $456 | 2025-12 |
| Oklahoma State Auctioneers Association | Recreation and sports | 501(c)(4) | 2023 | $122,825 | $37,806 | 2025-12 |
| Central Community Foundation | Human services | 501(c)(3) | 2008 | $120,258 | $217,449 | 2025-12 |
| Stillwater Home Builders Association Inc | 501(c)(6) | 1984 | $112,404 | $192,997 | 2025-12 | |
| Oklahoma Assistive Technology Foundation | Human services | 501(c)(3) | 2001 | $112,226 | $2 million | 2025-06 |
| Kentucky Auctioneers Association Inc | Community improvement and capacity building | 501(c)(3) | 2021 | $110,688 | $223,996 | 2025-12 |
| Oklahoma Mortgage Bankers Association | 501(c)(6) | 1985 | $104,787 | $77,868 | 2025-12 | |
| Tennessee Auctioneers Association Inc | 501(c)(6) | 1973 | $104,516 | $172,677 | 2025-12 | |
| Osu Animal Science Alumni Association | Education | 501(c)(3) | 2023 | $101,712 | $16,964 | 2025-06 |
| Redeemed Global Ministries Inc | Religion-related | 501(c)(3) | 2024 | $101,055 | $21,912 | 2025-12 |
| Minnesota State Auctioneers Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2009 | $90,661 | $146,205 | 2026-02 |
| American Legion | 501(c)(19) | 1946 | $90,551 | $858,329 | 2025-12 | |
| Early Childhood Coalition | Human services | 501(c)(3) | 2017 | $89,876 | $166,280 | 2025-12 |
| Oklahoma Prescribed Burn Association | Environment | 501(c)(3) | 2015 | $87,950 | $173,767 | 2025-12 |
| Society for Scientific Exploration | 501(c)(3) | 1987 | $87,348 | $57,813 | 2025-12 | |
| Oklahoma Farm Bureau | 501(c)(5) | 1960 | $78,289 | $322,839 | 2025-08 | |
| Kappa Alpha Order | 501(c)(7) | 1940 | $71,959 | $776 | 2025-06 | |
| Kickin Childhood Hunger Inc | Human services | 501(c)(3) | 2015 | $68,732 | $49,884 | 2025-12 |
| Alabama Auctioneers Association Inc | 501(c)(6) | 1990 | $66,595 | $106,034 | 2025-12 | |
| Birth Choice of Stillwater Inc | Health care | 501(c)(3) | 2019 | $66,508 | $10,368 | 2025-12 |
| Sangre Ridge Elementary Pto | Education | 501(c)(3) | 2020 | $65,508 | $2,390 | 2024-12 |
| Parent Booster USA Inc | Education | 501(c)(3) | 2005 | $64,409 | $24,442 | 2025-06 |
| Oklahoma Farm House Corporation | 501(c)(7) | 1974 | $64,237 | $8.4 million | 2025-06 | |
| Colorado Auctioneers Association Inc 03-17-92 | 501(c)(6) | 1994 | $60,439 | $46,319 | 2025-12 | |
| International Association of Lions Clubs | 501(c)(4) | 1940 | $60,187 | $21,566 | 2025-06 | |
| Greek Neighborhood Association of Stillwater Oklahoma Incorporated | Education | 501(c)(3) | 2016 | $58,924 | $302,926 | 2025-12 |
| Stillwater Housing Development Corporation | Housing and shelter | 501(c)(3) | 1999 | $56,065 | $483,711 | 2025-09 |
| Oklahoma Turfgrass Research Foundation Inc | Food, agriculture and nutrition | 501(c)(5) | 2011 | $55,359 | $36,608 | 2025-12 |
| International Association of Fire Fighters | 501(c)(5) | 1959 | $54,667 | $98,540 | 2025-10 | |
| Companion Animal Assistance Program Inc | Animal-related | 501(c)(3) | 2001 | $53,962 | $31,057 | 2025-12 |
| Oklahoma Predictive Maintenance Users Group Inc | 501(c)(3) | 1994 | $51,729 | $110,059 | 2025-12 | |
| Oklahoma Home and Community Education Inc | 501(c)(3) | 1967 | $50,276 | $316,021 | 2024-12 | |
| Payne County Child Welfare Advisory Committee Inc | 501(c)(3) | 1966 | $44,949 | $607,661 | 2025-06 | |
| Kansas Auctioneers Association Inc | Community improvement and capacity building | 501(c)(6) | 2014 | $41,089 | $99,199 | 2025-12 |
| Oklahoma State College of Veterinary Medicine Savma Chapter | 501(c)(6) | 1947 | $39,678 | $60,285 | 2025-06 | |
| Payne County Conservation Foundation Inc | Environment | 501(c)(3) | 1992 | $32,686 | $436,885 | 2026-06 |
| University Heights Baptist Church Foundation Inc | Religion-related | 501(c)(3) | 2003 | $32,037 | $420,904 | 2026-03 |
| Pta Oklahoma Congress | 501(c)(3) | 1972 | $25,747 | $40,367 | 2026-06 | |
| International Society of Photosynthesis Research | Science and technology | 501(c)(3) | 2007 | $18,476 | $217,250 | 2025-12 |
| Stillwater Stix Baseball Association | Recreation and sports | 501(c)(3) | 2022 | $5,970 | $12,183 | 2024-12 |
| Army Ground Forces Association | Arts, culture and humanities | 501(c)(3) | 2009 | $5,305 | $46,100 | 2025-12 |
| Rotary International | 501(c)(4) | 1942 | $4,036 | $1 | 2022-12 | |
| Oklahoma Association of Government Guaranteed Lenders | Community improvement and capacity building | 501(c)(6) | 2015 | $833 | $44,102 | 2024-12 |
| The Cornerstone Collective Inc | Human services | 501(c)(3) | 2026 | $700 | $700 | 2025-12 |
| 1889institute | Public and societal benefit | 501(c)(3) | 2019 | $0 | $0 | 2024-03 |
| 4kidzsake-Org Inc | Youth development | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| About Face Womens Program Inc | Crime and legal-related | 501(c)(3) | 2020 | $0 | $0 | 2024-12 |
| Administration Division of the Oklahoma Association of Career & T | Education | 501(c)(6) | 2014 | $0 | $0 | 2025-06 |
| Agricultural Leadership of Oklahoma Inc | Human services | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Allies Lunar Love | Health care | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Alpha Omicron Pi Omega Sigma Parent S Club | Education | 501(c)(3) | 2026 | |||
| Alpha Pi Mu Association | 501(c)(3) | 1994 | $0 | $0 | 2024-12 | |
| Altrusa International Foundation Inc | Education | 501(c)(3) | 1985 | $0 | $0 | 2026-05 |
| Amazing Grace Foundations | Human services | 501(c)(3) | 2026 | $0 | $0 | 2025-12 |
| American Christian Fiction Writers Inc | Community improvement and capacity building | 501(c)(6) | 2010 | $0 | $0 | 2025-12 |
| American Collegiate Retailing Association | Education | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| American Fisheries Society | 501(c)(3) | 1993 | $0 | $0 | 2025-12 | |
| American Guild of Organists Ago | 501(c)(3) | 1955 | $0 | $0 | 2025-06 | |
| American Institute of Aeronautics and Astronautics | 501(c)(3) | 1967 | $0 | $0 | 2025-09 | |
| American Legion Auxiliary | 501(c)(19) | 1946 | $0 | $0 | 2025-07 | |
| American Postal Workers Union | 501(c)(5) | 1973 | $0 | $0 | 2025-12 | |
| Ancient Free & Accepted Masons of Oklahoma | 501(c)(10) | 1943 | $0 | $0 | 2025-12 | |
| Aoi Inc | Public and societal benefit | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Appa-Association of Higher Education Facilities Officers | Community improvement and capacity building | 501(c)(3) | 1977 | $0 | $0 | 2025-03 |
| Arkansas Auctioneers Association | Community improvement and capacity building | 501(c)(6) | 2010 | $0 | $0 | 2025-12 |
| Arnold Air Society-Silver Wings | 501(c)(4) | $0 | $0 | 2025-08 | ||
| Arts & Humanities Council of Stillwater Oklahoma Inc | Arts, culture and humanities | 501(c)(3) | 1973 | $0 | $0 | 2026-05 |
| Association for Computing Machinery | 501(c)(3) | 1968 | $0 | $0 | 2022-06 | |
| Association of Retired Conservation Service Employees | 501(c)(4) | 1974 | $0 | $0 | 2025-06 | |
| Bahais of Stillwater | 501(c)(3) | 1995 | ||||
| Bays Family Cemetery Foundation Inc | Mutual and membership benefit | 501(c)(13) | 2016 | $0 | $0 | 2025-06 |
| Believers Fellowship Church | 501(c)(3) | 1969 | ||||
| Beta Alpha Psi National Council | 501(c)(3) | 1974 | $0 | $0 | 2026-04 | |
| Bible Baptist Church Inc | 501(c)(3) | 1971 | ||||
| Books Over the World Inc | Education | 501(c)(3) | 2020 | $0 | $0 | 2024-12 |
| Bridges Built By Us Incorporated | Civil rights, social action and advocacy | 501(c)(3) | 2025 | |||
| Brush Creek Service and Therapy Dog Center Inc | Human services | 501(c)(3) | 2026 | |||
| CFF Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2022 | $1,532 | 2025-12 | |
| Calvary Assembly of God | 501(c)(3) | 1964 | ||||
| Change for Congo Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| Chi Chapter of Sigma Sigma Sigma Ho Using Corporation | Recreation and sports | 501(c)(7) | 2026 | |||
| Chi Omega Fraternity | Recreation and sports | 501(c)(7) | 1940 | $0 | $0 | 2026-04 |
| Christian and Missionary Alliance of Stillwater Oklahoma | 501(c)(3) | 1972 | ||||
| Church in Stillwater Inc | 501(c)(3) | 1990 | ||||
| Church of Christ of Stillwater Oklahoma A Corporation | 501(c)(3) | 1987 | ||||
| Circle K International Inc | Youth development | 501(c)(4) | 2004 | $0 | $0 | 2023-09 |
| Cottage of Healing & Restoration Foundation | Mental health and crisis intervention | 501(c)(3) | 2026 | $0 | $0 | 2025-12 |
| Cottonwood Community Center Association | Community improvement and capacity building | 501(c)(3) | 2024 | $0 | $0 | 2024-12 |
| Cowboy Canyon Foundation | Human services | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Cowboy Hockey Incorporated | Education | 501(c)(3) | 2024 | |||
| Curriculum Instruction and Assessment -Cia- | Community improvement and capacity building | 501(c)(6) | 2003 | $0 | $0 | 2025-06 |
| DH Rep Inc | Education | 501(c)(3) | 2025 | |||
| Delta Zeta Sorority | 501(c)(7) | 1970 | $0 | $0 | 2021-06 | |
| Demolay International | Arts, culture and humanities | 501(c)(3) | 1996 | $0 | $0 | 2025-12 |
| Diamond Point Preservation Association | Arts, culture and humanities | 501(c)(3) | 1995 | $0 | $0 | 2025-08 |
| Diamond Valley Community Center | 501(c)(4) | 1949 | $0 | $0 | 2025-09 | |
| Distributive Education Clubs of America | 501(c)(3) | 1951 | ||||
| Downtown Stillwater Association | Arts, culture and humanities | 501(c)(3) | 2022 | $0 | $0 | 2024-07 |
| Dragon Stables Equine Center Inc | Animal-related | 501(c)(3) | 2020 | $0 | $0 | 2026-03 |
| Drummond Family Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2018 | $636,037 | 2025-12 | |
| Eco-Balance Initiative | Environment | 501(c)(3) | 2026 | |||
| Encounter Church Stillwater Inc | Religion-related | 501(c)(3) | 2015 | |||
| Equine Savior Corporation | Animal-related | 501(c)(3) | 2006 | $0 | $0 | 2024-12 |
| Faith Global Medical Missions Inc | Religion-related | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Faye Allene Rife Brown Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 1999 | $71,179 | 2025-12 | |
| Fellowship of University Students at Oklahoma State University Inc | 501(c)(3) | 1975 | ||||
| Firefighter Challenge Team | Human services | 501(c)(3) | 2025 | $0 | $0 | 2025-04 |
| First Assembly of God | 501(c)(3) | 1964 | ||||
| First Baptist Church Foundation Inc | Religion-related | 501(c)(3) | 1996 | $483,904 | 1995-12 | |
| First Christian Church | 501(c)(3) | 1951 | ||||
| Focus Foundation of Stillwater Inc | Mental health and crisis intervention | 501(c)(3) | 2011 | $0 | $0 | 2024-12 |
| Frank Pistol Pete Eaton Legacy Foundation | Education | 501(c)(3) | 2023 | $6,008 | 2025-12 | |
| Fraternal Order of Eagles | 501(c)(8) | 1991 | $0 | $0 | 2025-04 | |
| Fraternal Order of Eagles | 501(c)(8) | 1991 | $0 | $0 | 2025-06 | |
| Friends of Northern Flyer Alliance Inc | Environment | 501(c)(3) | 2011 | $0 | $0 | 2025-12 |
| Friends of the Stillwater Public Library | 501(c)(3) | 1988 | $0 | $0 | 2025-12 | |
| Genealogy Partners of the Stillwater Library | Education | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Georgia Auctioneers Association Inc | 501(c)(6) | 1969 | $0 | $0 | 2025-12 | |
| Glenn and Laura Collum Family Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2017 | $2.4 million | 2024-12 | |
| Great Plains Canola Association Incorporated | Food, agriculture and nutrition | 501(c)(5) | 2008 | $0 | $0 | 2024-12 |
| Great Plains Preservation and Development Foundation | Environment | 501(c)(3) | 1994 | $0 | $0 | 2024-12 |
| Greenhaven Cemetery Inc | Mutual and membership benefit | 501(c)(13) | 2012 | $0 | $0 | 2024-12 |
| Hazel Modella Gallery LTD | Arts, culture and humanities | 501(c)(3) | 2017 | $0 | $0 | 2025-12 |
| Healthy Children Healthy Communitie S Coalition Inc | Human services | 501(c)(3) | 2026 | |||
| Highlands Latin School Stillwater I NC | Education | 501(c)(3) | 2026 | $0 | $0 | 2025-12 |
| Holder Family Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2004 | $13,043 | 2025-12 | |
| Home Fellowships Incorporated | Religion-related | 501(c)(3) | 1996 | |||
| Honor Society of Phi Kappa Phi | 501(c)(3) | 1972 | $0 | $0 | 2026-06 | |
| Hope Community Fellowship Inc | Religion-related | 501(c)(3) | 2023 | |||
| Hosanna Church | 501(c)(3) | 1964 | ||||
| Hospice Quality Care Bell-Childers Foundation | Human services | 501(c)(3) | 1999 | $0 | $0 | 2025-12 |
| K-Life Ministries | 501(c)(3) | 1991 | ||||
| Kappa Alpha Theta Fraternity | 501(c)(7) | 1940 | 2001-06 | |||
| Kappa Alpha Theta Fraternity | 501(c)(7) | 1940 | $0 | $0 | 2026-06 | |
| Kappa Kappa Gamma Fraternity Inc Delta Sigma House Corp | Education | 501(c)(7) | 1974 | 2019-06 | ||
| Kappa Kappa Psi Fraternity | 501(c)(3) | 1976 | ||||
| Karsten Foundation Inc | Education | 501(c)(3) | 2026 | |||
| Kiwanis International Inc | 501(c)(4) | 1940 | $0 | $0 | 2025-09 | |
| Knights Templar of the United States of America | 501(c)(10) | 1964 | $0 | $0 | 2025-12 | |
| Knights of Columbus | 501(c)(8) | 1940 | $0 | $0 | 2025-06 | |
| Knights of Columbus | 501(c)(8) | 1940 | $0 | $0 | 2025-12 | |
| Knights of Columbus | 501(c)(8) | 1940 | $0 | $0 | 2025-06 | |
| LC Ministries Inc | Religion-related | 501(c)(3) | 2012 | $0 | $0 | 2025-12 |
| Lady Pioneers Basketball Booster | Education | 501(c)(3) | 2024 | |||
| Lakeview Community Church Inc | 501(c)(3) | 1993 | ||||
| Launchpoint Foundation | Community improvement and capacity building | 501(c)(3) | 2025 | |||
| Linehan Family Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2001 | $302,184 | 2024-12 | |
| Little Ripple Design Study Foundation | International, foreign affairs and national security | 501(c)(3) | 2003 | $0 | $0 | 2024-12 |
| Materials Research Foundation | Science and technology | 501(c)(3) | 1995 | $0 | $0 | 2025-12 |
| Matthias Ministries Inc | Religion-related | 501(c)(3) | 2001 | |||
| Melody Christian Fellowship | 501(c)(3) | 1981 | ||||
| Methodist Protestant Church of Oklahoma Inc | Religion-related | 501(c)(3) | 2008 | |||
| Midwest Art History Society Inc | Arts, culture and humanities | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| Mosaic Community | 501(c)(3) | 1964 | ||||
| Mount Zion Missionary Babtist Church | Religion-related | 501(c)(3) | 2007 | |||
| Myas Promise Inc | Human services | 501(c)(3) | 2007 | $0 | $0 | 2025-12 |
| Narrative Student Ministries Inc | Religion-related | 501(c)(3) | 2025 | |||
| National Active and Retired Federal Employees Association | 501(c)(5) | 1963 | $0 | $0 | 2025-12 | |
| National Agricultural Communicators of Tomorrow | Education | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| National Air Traffic Controllers Association | 501(c)(5) | 1990 | $0 | $0 | 2025-12 | |
| National Association of Extension Program and Staff Development Prof | Education | 501(c)(3) | 2014 | $122,790 | 2025-12 | |
| National Headquarters of the National Society of Scabbard and B | 501(c)(4) | 1954 | $0 | $0 | 2025-08 | |
| National Society Daughters of the Union 1861-1865 Inc | 501(c)(3) | 1951 | $0 | $0 | 2026-03 | |
| National Society of the Daughters of the American Revolution | 501(c)(3) | 1949 | $0 | $0 | 2025-12 | |
| Natures Vein Wildlife Rescue | Animal-related | 501(c)(3) | 2017 | $0 | $0 | 2025-12 |
| New Conenant Fellowship of Stillwater | 501(c)(3) | 1985 | ||||
| New Covenant Fellowship of Stillwater | 501(c)(3) | 1986 | ||||
| New York State Auctioneers Association Inc | 501(c)(6) | 1994 | $0 | $0 | 2025-12 | |
| New and Related Services Division of Oklahoma Association for Career | Community improvement and capacity building | 501(c)(6) | 2002 | $0 | $0 | 2025-06 |
| No Medication Left Behind Foundation | Mental health and crisis intervention | 501(c)(3) | 2025 | |||
| Oasis Full Gospel Ministries | Religion-related | 501(c)(3) | 1999 | |||
| Okla Association of Career & Technology Education Guidance Div | Community improvement and capacity building | 501(c)(6) | 2003 | $0 | $0 | 2026-06 |
| Oklahoma Academic Advising Assoc Oacada | Education | 501(c)(3) | 2024 | |||
| Oklahoma Assoc of Career & Tech Ed Business & Info Tech Education | Education | 501(c)(6) | 2025 | $0 | $0 | 2025-06 |
| Oklahoma Association for Institutio Nal Research | Education | 501(c)(3) | 2011 | $0 | $0 | 2023-12 |
| Oklahoma Bicycling Coalition | Recreation and sports | 501(c)(4) | 2018 | $0 | $0 | 2025-12 |
| Oklahoma Bike Summit Inc | Recreation and sports | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Oklahoma Extension Association of Family & Consumer Sciences | 501(c)(6) | 1971 | $0 | $0 | 2026-06 | |
| Oklahoma Home and Community Education Inc | 501(c)(3) | 1967 | $0 | $0 | 2025-12 | |
| Oklahoma Home and Community Education Inc | 501(c)(3) | 1967 | $0 | $0 | 2025-12 | |
| Oklahoma Home and Community Education Inc | 501(c)(3) | 1967 | $0 | $0 | 2025-12 | |
| Oklahoma Home and Community Education Inc | 501(c)(3) | 1967 | $0 | $0 | 2025-12 | |
| Oklahoma Home and Community Education Inc | 501(c)(3) | 1967 | $0 | $0 | 2025-12 | |
| Oklahoma Home and Community Education Inc | 501(c)(3) | 1967 | $0 | $0 | 2025-12 | |
| Oklahoma Home and Community Education Inc | 501(c)(3) | 1967 | $0 | $0 | 2025-12 | |
| Oklahoma Home and Community Education Inc | 501(c)(3) | 1967 | $0 | $0 | 2025-12 | |
| Oklahoma Lactation Consultant Association | Human services | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Oklahoma Prescribed Burn Association Group | Environment | 501(c)(3) | 2015 | |||
| Oklahoma Science Technology Engineering Math Association | Community improvement and capacity building | 501(c)(6) | 2014 | $0 | $0 | 2025-06 |
| Oklahoma Section Institute of Food Technologies | Food, agriculture and nutrition | 501(c)(3) | 2019 | $0 | $0 | 2024-08 |
| Oklahoma Section Society for Range Management | Education | 501(c)(3) | 1999 | $0 | $0 | 2025-12 |
| Oklahoma Society of Certified Public Accountants | 501(c)(6) | 1986 | ||||
| Oklahoma State University Emeriti Association | Education | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| Oklahoma Texas Longhorn Association Inc | Animal-related | 501(c)(5) | 2014 | $0 | $0 | 2025-12 |
| Oklahoma Voluntary Organizations Active in Disaster | Public safety, disaster preparedness and relief | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Okunity Federal Credit Union | 501(c)(1) | 2021 | ||||
| Omicron Lambda Chapter of Omega Psi Phi Fraternity Inc | Community improvement and capacity building | 501(c)(7) | 2025 | $0 | $0 | 2025-10 |
| Osu Pi Kappa Alpha Parents Club Inc | Education | 501(c)(3) | 2022 | $0 | $0 | 2026-06 |
| Osu Pi Kappa Phi Family Association | Education | 501(c)(3) | 2026 | |||
| Osu Rodeo Alumni and Friends | Recreation and sports | 501(c)(3) | 2019 | |||
| Our Lady of Grace Catholic Retreat Center | 501(c)(3) | 1946 | ||||
| Pandamonium Small and Exotic Animal Rescue Society | Animal-related | 501(c)(3) | 2025 | |||
| Parent Booster USA Inc | 501(c)(3) | 2005 | $0 | $0 | 2026-06 | |
| Payne County Animal Response Team Inc | Animal-related | 501(c)(3) | 2016 | $0 | $0 | 2026-06 |
| Payne County Audubon Society | 501(c)(3) | 1984 | $0 | $0 | 2025-10 | |
| Payne County Pride Association | Civil rights, social action and advocacy | 501(c)(3) | 2018 | $0 | $0 | 2023-12 |
| Payne County Reserves | Crime and legal-related | 501(c)(3) | 2026 | |||
| Perkins-Tryon Alumni Association | Education | 501(c)(3) | 2026 | |||
| Pflag Stillwater | 501(c)(3) | 1994 | $0 | $0 | 2025-09 | |
| Phi Eta Sigma National Honor Society Inc | Education | 501(c)(3) | 2014 | |||
| Phi Kappa Sigma Fraternity | 501(c)(7) | 1940 | $0 | $0 | 2023-12 | |
| Phi Upsilon Omicron Inc | 501(c)(3) | 1947 | $0 | $0 | 2025-07 | |
| Pi Kappa Phi Fraternity | 501(c)(7) | 1991 | $0 | $0 | 2025-12 | |
| Pioneer Tennis Booster Club | Recreation and sports | 501(c)(3) | 2022 | $0 | $0 | 2026-06 |
| Plains Seed Foundation | Science and technology | 501(c)(3) | 2017 | $0 | $0 | 2025-12 |
| Pleasant Valley School Foundation | 501(c)(3) | 1987 | $0 | $0 | 2025-12 | |
| Project Orange Basket | Human services | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Psi Chi the International Honor Society in Psychology | 501(c)(3) | 1957 | $0 | $0 | 2025-06 | |
| Pta Oklahoma Congress | 501(c)(3) | 1972 | $0 | $0 | 2025-12 | |
| Pta Oklahoma Congress | 501(c)(3) | 1971 | $0 | $299,122 | 2025-06 | |
| Pta Oklahoma Congress | 501(c)(3) | 1972 | $0 | $0 | 2025-10 | |
| Raising Voices Inc | Arts, culture and humanities | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Request Relief Foundation | Human services | 501(c)(3) | 2024 | $0 | $0 | 2024-12 |
| Resilient Payne County Inc | Crime and legal-related | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Rhett Cheatwood Ministries Inc | Religion-related | 501(c)(3) | 2026 | |||
| Richard James Family Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2000 | $548,973 | 2025-12 | |
| Richmond Parent Teacher Organizatio N Inc | Education | 501(c)(3) | 2026 | |||
| Ride To Worship Inc | 501(c)(3) | 1994 | ||||
| Ripley Golf Club | Recreation and sports | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Ripleys Rough Riders Roundup Rodeo Foundation | Arts, culture and humanities | 501(c)(3) | 2026 | |||
| Ripple Effect Research Foundation | Social science | 501(c)(3) | 2026 | $0 | $0 | 2025-12 |
| Robert Turner Ministries Inc | Religion-related | 501(c)(3) | 2018 | $0 | $0 | 2025-12 |
| Rotary International | Community improvement and capacity building | 501(c)(4) | 2014 | $0 | $0 | 2023-07 |
| Royal & Select Masters Stillwater Council No 50 | 501(c)(10) | 1973 | $0 | $0 | 2025-12 | |
| Royal Arch Mason 14 Stillwater | 501(c)(10) | 1973 | $0 | $0 | 2025-12 | |
| Rural Energy Resources Inc | Human services | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| SGH Foundation | Community improvement and capacity building | 501(c)(3) | 2020 | $0 | $0 | 2024-12 |
| SJC Sports | Recreation and sports | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Safe-Ministries Inc | Religion-related | 501(c)(3) | 1994 | |||
| Scabbard and Blade Endowment Resources Inc | 501(c)(3) | 1970 | $0 | $0 | 2025-08 | |
| Shilohs Place Inc | 501(c)(3) | 2017 | $0 | $0 | 2025-12 | |
| Show Compassion Foundation | Human services | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Skills USA Inc | 501(c)(3) | 1966 | ||||
| Social Media Advisory Counsel Inc | Public and societal benefit | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Society of Phi Zeta | 501(c)(3) | 1966 | $0 | $0 | 2024-06 | |
| Solid Rock Church Inc | 501(c)(3) | 1992 | ||||
| Southern Kansas Brittany Club | Recreation and sports | 501(c)(7) | 2025 | $0 | $0 | 2025-12 |
| Spectrum Perspectives | Arts, culture and humanities | 501(c)(3) | 2023 | $0 | $0 | 2023-12 |
| St James Orthodox Christian Church | 501(c)(3) | 1962 | ||||
| Starlight Ministries | 501(c)(3) | |||||
| Stillwater Agriculture Boosters | Food, agriculture and nutrition | 501(c)(3) | 2024 | $0 | $0 | 2026-06 |
| Stillwater Area Human Resource Association | Community improvement and capacity building | 501(c)(6) | 2013 | $0 | $0 | 2025-12 |
| Stillwater Bible Church Inc | Religion-related | 501(c)(3) | 2013 | 2015-12 | ||
| Stillwater Car Club | Recreation and sports | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Stillwater Cares | Human services | 501(c)(3) | 2010 | $0 | $0 | 2025-12 |
| Stillwater Chapt 1368 Women of the Moose | 501(c)(8) | 1935 | $0 | $0 | 2026-04 | |
| Stillwater Christian School Pto Inc | Education | 501(c)(3) | 2026 | |||
| Stillwater Christian Services Inc | 501(c)(3) | 1990 | $0 | $0 | 2025-12 | |
| Stillwater Community Band | Arts, culture and humanities | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Stillwater Community Singers Inc | Arts, culture and humanities | 501(c)(3) | 2009 | $0 | $0 | 2023-12 |
| Stillwater Cross Country | Education | 501(c)(3) | 2026 | |||
| Stillwater Firefighters Foundation | Public safety, disaster preparedness and relief | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Stillwater Foundation for Progress | 501(c)(3) | 1979 | $0 | $0 | 2025-12 | |
| Stillwater Generals Baseball | Youth development | 501(c)(3) | 2019 | $0 | $0 | 2024-12 |
| Stillwater Girls Incorporated | Youth development | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| Stillwater High School Cheer Boosters | Education | 501(c)(3) | 2023 | $0 | $0 | 2026-06 |
| Stillwater High School Pto | Education | 501(c)(3) | 2026 | |||
| Stillwater High School Soccer Booster Club | Recreation and sports | 501(c)(3) | 2019 | $0 | $0 | 2025-05 |
| Stillwater Industrial Foundation Inc | 501(c)(6) | 1959 | $0 | $0 | 2025-12 | |
| Stillwater Jefferson White Cloud Foundation | Human services | 501(c)(3) | 1997 | $1 | 2023-12 | |
| Stillwater Junior High School Pto | Education | 501(c)(3) | 2025 | |||
| Stillwater Literacy Council | Education | 501(c)(3) | 1997 | $0 | $0 | 2025-12 |
| Stillwater Masonic Building Association | Housing and shelter | 501(c)(10) | 2011 | $0 | $0 | 2025-12 |
| Stillwater Middle School Pto | Education | 501(c)(3) | 2024 | $0 | $0 | 2025-06 |
| Stillwater Pioneer Athlete Memorial Inc | Education | 501(c)(3) | 2002 | $0 | $0 | 2025-12 |
| Stillwater Pioneer Band Boosters | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2010 | $0 | $0 | 2025-12 |
| Stillwater Pioneer Robotics Program Booster Club | Education | 501(c)(3) | 2026 | |||
| Stillwater Pioneers Boys Basketball Booster Club | Education | 501(c)(3) | 2023 | $0 | $0 | 2026-06 |
| Stillwater Rifle & Pistol Club Inc | 501(c)(9) | 1984 | $0 | $0 | 2025-12 | |
| Stillwater Sister School Exchange Booster | Education | 501(c)(3) | 2025 | $0 | $0 | 2025-06 |
| Stillwater Tennis Association | Recreation and sports | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| Stillwater Touchdown Club | Recreation and sports | 501(c)(3) | 2015 | $0 | $0 | 2025-12 |
| Stillwater Youth Football & Cheer Association | Recreation and sports | 501(c)(3) | 2019 | $0 | $0 | 2024-12 |
| Sunnybrook Christian Church Inc | 501(c)(3) | 1977 | ||||
| Support Staff Section of the New & Related Services of the Ok Assoc | Community improvement and capacity building | 501(c)(6) | 2002 | $0 | $0 | 2025-06 |
| Supporting Stillwater Homeschoolers | Education | 501(c)(3) | 2014 | $0 | $0 | 2023-12 |
| Tau Beta Pi Association Inc | 501(c)(7) | 1945 | $0 | $0 | 2025-12 | |
| Tau Beta Pi Association Inc | 501(c)(7) | 1945 | $0 | $0 | 2025-12 | |
| Tau Beta Sigma National Honorary Band Sorority | 501(c)(3) | 1976 | $0 | $0 | 2025-12 | |
| Tau Beta Sigma National Honorary Band Sorority | 501(c)(3) | 1976 | $0 | $0 | 2025-06 | |
| Tau Beta Sigma National Honorary Band Sorority | 501(c)(3) | 1976 | $0 | $0 | 2025-06 | |
| Tau Beta Sigma National Honorary Band Sorority | 501(c)(3) | 1976 | $0 | $0 | 2025-06 | |
| Tau Beta Sigma National Honorary Band Sorority | 501(c)(3) | 1976 | $0 | $0 | 2025-06 | |
| Tau Beta Sigma National Honorary Band Sorority | 501(c)(3) | 1976 | $0 | $0 | 2025-06 | |
| Tau Beta Sigma National Honorary Band Sorority | 501(c)(3) | 1976 | $0 | $0 | 2026-06 | |
| The Farm Sports Initiative Incorporated | Recreation and sports | 501(c)(3) | 2026 | |||
| The Oklahoma Association Teachers of Family and Consumer Sciences | Education | 501(c)(6) | 2010 | $0 | $0 | 2025-06 |
| The Starting Keys Foundation | Arts, culture and humanities | 501(c)(3) | 2026 | |||
| The Teubner Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2000 | $704,602 | 2024-12 | |
| Theta Education Fund | Education | 501(c)(3) | 2022 | $0 | $1.3 million | 2025-06 |
| Three Strands Ministry Inc | Religion-related | 501(c)(3) | 2012 | |||
| Thunderstorm Robotics | Youth development | 501(c)(3) | 2022 | $0 | $0 | 2025-06 |
| Trial By Fire Foundation Incorporat Ed | Mental health and crisis intervention | 501(c)(3) | 2026 | |||
| Twelve and Twenty-Four Club of Stillwater Oklahoma | Mental health and crisis intervention | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Undivided Inc | Mental health and crisis intervention | 501(c)(3) | 2024 | $0 | $0 | 2024-12 |
| United Ostomy Association of America Inc | Medical research | 501(c)(3) | 2006 | $0 | $0 | 2025-12 |
| Universidad Popular Autonoma Del Estado de Puebla | Education | 501(c)(3) | 2022 | $1,587 | 2025-12 | |
| VFW Auxiliary Department of Oklahoma Inc | Public and societal benefit | 501(c)(19) | 2009 | $0 | $0 | 2026-06 |
| Veterans of Foreign Wars of the United States Dept of Oklahoma | 501(c)(4) | 1945 | $0 | $0 | 2026-06 | |
| Victory Tabernacle of Stillwater Oklahoma | 501(c)(3) | 1979 | ||||
| Washington School Heritage Foundation | Arts, culture and humanities | 501(c)(3) | 2024 | $0 | $0 | 2024-12 |
| Wesley Foundation at Stillwater Oklahoma Inc | Religion-related | 501(c)(3) | 2020 | |||
| Westwood Elementary Pto | Education | 501(c)(3) | 2020 | $0 | $0 | 2024-12 |
| Wildly Brave Dance Company | Arts, culture and humanities | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Wishes for Water | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Word Generation Church | 501(c)(3) | 1989 | ||||
| Zion Lutheran Church | 501(c)(3) | 1941 |
By cause in Stillwater, OK
- Education 58
- Human services 27
- Recreation and sports 23
- Religion-related 21
- Arts, culture and humanities 20
- Community improvement and capacity building 18
- Philanthropy, voluntarism and grantmaking foundations 15
- Animal-related 10
- Youth development 8
- Food, agriculture and nutrition 8
- Mental health and crisis intervention 8
- Environment 7
- Health care 6
- Crime and legal-related 4
- Public and societal benefit 4
- Science and technology 3
- Housing and shelter 3
- Civil rights, social action and advocacy 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.