Okmulgee Medical Foundation Inc

Sam Viersen Family Foundation Inc

Tulsa, OK

The foundation funds basic needs, education, self-sufficiency, and cultural enrichment, primarily for communities in northeast Oklahoma, with a focus on Tulsa and Okmulgee Counties; it also offers scholarships to eligible Okmulgee County students. It advertises grants of $1,000 to $500,000, though its 2024 median grant was $5,500. It accepts unsolicited requests through a letter of inquiry due June 30, with full proposals invited from approved applicants.

Ressa Foundation

Mounds, OK

Folds of Honor Foundation

Owasso, OK

Folds of Honor funds education scholarships for spouses and children of U.S. military service members and first responders killed or disabled in service, with awards available for K–12 and higher education in the United States and its territories. Awards are up to $5,000 per academic year, based on unmet need, and are paid directly to the school. It accepts scholarship applications through an online portal during its annual application window; it does not make grants to outside applicants.

Tulsa Community Foundation

Tulsa, OK

Tulsa Community Foundation supports a broad range of charitable needs, including arts and humanities, healthcare, education, scholarships, emergency assistance, and endowments. Its 2024 grants had a median of $18,560 and primarily benefited the Tulsa area and eastern Oklahoma, with grants also reaching elsewhere in the U.S.; it administers application cycles for selected funds.

Oklahoma City Community Foundation Inc

Oklahoma City, OK

The Oklahoma City Community Foundation funds local nonprofits in areas including health care access, children’s opportunities, culture and community, services for older adults, parks and public spaces, and animal welfare. Its 2025 grants had a median award of $18,251, though amounts varied widely; Community Grants focus on Central Oklahoma. The profile does not state whether it accepts unsolicited requests.

The Anne and Henry Zarrow Foundation

Tulsa, OK

The foundation supports nonprofits addressing poverty through housing and homelessness services, basic needs, and physical and mental healthcare, primarily in the Tulsa metropolitan area, with occasional grants elsewhere in Oklahoma and in Israel. Its 2024 median grant was about $24,000, though awards ranged from $200 to $2.2 million; organizations may submit a rolling inquiry, but full proposals are by invitation only.

George Kaiser Family Foundation

Tulsa, OK

George Kaiser Family Foundation funds early childhood education and family support, community health and justice, and neighborhood revitalization, civic projects, and the arts, with a place-based focus on Tulsa. Its 2024 grants had a median of $50,000, though awards ranged widely; it does not accept unsolicited requests for general grantmaking, but its Accelerator Grants initiative is an exception.

Inasmuch Foundation

Oklahoma City, OK

Inasmuch Foundation supports community enhancement, education, human services, and journalism, with a focus on improving life for Oklahomans; education grants are limited to Oklahoma-based 501(c)(3) organizations. Grants vary widely: 2024 awards ranged from $50 to $1.5 million, with a median of $10,000, while eligible general operating requests may be $50,000 or $100,000. It accepts unsolicited requests through its online system in spring and fall; summer requests are by invitation only.

Communities Foundation of Oklahoma

Oklahoma City, OK

It supports charitable programs in Oklahoma, including housing and shelter, community development, education, and fund-specific priorities such as mental health, arts, and human services; 94% of its 2025 grant dollars went to Oklahoma recipients. Its 2025 grants had a median of $17,139, though amounts varied widely; it accepts applications for specific funds through its online grant portal, but no general unsolicited-request policy is stated.

One Gas Foundation Inc

Tulsa, OK

ONE Gas Foundation supports community enrichment and assistance, education and workforce development (including STEAM and leadership), and community collaboration, with grants benefiting public services, schools, workforce programs, culture, and recreation. Its 2024 grants ranged from $50 to $366,741, with a median of $2,370; most funding went to Oklahoma, followed by Texas and Kansas. The profile does not state whether it accepts unsolicited requests.

The Alliance for Economic Development

Oklahoma City, OK

The Alliance funds economic development, business assistance, workforce development, and redevelopment, including grants to organizations and support for eligible Oklahoma City businesses and nonprofits. In 2025, its grants ranged from $5,001 to $556,610, with a median of $24,313, and its programs focus on Oklahoma City. The profile describes applications for specific programs but does not state whether it accepts unsolicited requests.

American Fidelity Foundation

Oklahoma City, OK

The American Fidelity Foundation funds education, health and welfare, arts and culture, and civic and economic development, primarily in Oklahoma communities where its affiliated companies operate. Its website says grants to an organization typically range from $500 to $5,000, though reported grants have been larger; it does not accept unsolicited requests but invites organizations to submit a letter of interest.