| Parent Booster USA IncTulsa | Form 990-EZ | $59,167FY2026 |
| Greek Neighborhood Association of Stillwater Oklahoma IncorporatedStillwater | Form 990-EZ | $58,924FY2025 |
| Oklahoma Association for the Education of Young ChildrenEdmond | Form 990-EZ | $58,763FY2025 |
| Parent Booster USA IncWashington | Form 990-EZ | $58,729FY2025 |
| Terra Verde Discovery School PTO IncNorman | Form 990-EZ | $57,913FY2025 |
| Choctaw County Library IncHugo | Form 990 | $57,097FY2024 |
| Oklahoma City Metro Literacy CoalitionOklahoma City | Form 990-EZ | $56,947FY2025 |
| Elk City Elementary PTO IncElk City | Form 990-EZ | $56,518FY2025 |
| Creative Opportunities UnlimitedOklahoma City | Form 990-EZ | $55,941FY2025 |
| Putnam City North Band Booster AssociationOklahoma City | Form 990-EZ | $55,854FY2026 |
| Korean Culture and Language School of OklahomaOklahoma City | Form 990-EZ | $55,676FY2025 |
| Ranch Heights Elementary School Parent-Teacher Organization PTOBartlesville | Form 990-EZ | $53,744FY2025 |
| Committee of One Hundred Tulsa IncTulsa | Form 990-EZ | $53,733FY2024 |
| South Mingo Educators IncTulsa | Form 990-EZ | $53,316FY2025 |
| Northern Hills Parent Teacher Organization FundEdmond | Form 990-EZ | $51,986FY2025 |
| Oklahoma State Hospice Association IncArdmore | Form 990-EZ | $51,490FY2024 |
| Washington County School Supply Drive IncBartlesville | Form 990-EZ | $50,235FY2025 |
| Burlington Educational Foundation IncBurlington | Form 990-N | No figure |
| Edmond North Band Booster IncEdmond | Form 990-EZ | $48,242FY2025 |
| Oklahoma Rural Water Enrichment FoundationOklahoma City | Form 990-N | No figure |
| Parent Booster USA IncNewcastle | Form 990-EZ | $47,921FY2026 |
| Cheyenne Middle School Parent Teacher OrganizationEdmond | Form 990-EZ | $47,878FY2025 |
| Council of Oklahoma Private Education IncOklahoma City | Form 990-N | No figure |
| Parent Booster USA IncNorman | Form 990-EZ | $47,255FY2026 |
| Oklahoma Grand Assembly Charitable & Educational FoundationGuthrie | Form 990-EZ | $47,060FY2025 |
| Psi Education FoundationNorman | Form 990-N | No figure |
| Bartlesville Secondary Schools Parents Support Group IncBartlesville | Form 990-EZ | $46,159FY2025 |
| Washington Irving Parent Teacher Organization IncEdmond | Form 990-EZ | $45,243FY2026 |
| Parent Booster USA IncBroken Arrow | Form 990-EZ | $45,056FY2026 |
| Russell Dougherty Parent Teacher OrganizationEdmond | Form 990-EZ | $44,269FY2025 |
| Ponca City Aviation Foundation IncPonca City | Form 990-EZ | $43,059FY2024 |
| Parent Booster USA IncCushing | Form 990-EZ | $42,890FY2025 |
| Oklahoma Parents for Student Achievement IncOklahoma City | Form 990-N | No figure |
| 101 Classic Bowl FoundationWoodward | Form 990-EZ | $38,866FY2024 |
| Southmoore Sabercats Home Run ClubMoore | Form 990-EZ | $38,802FY2025 |
| Cimarron Parent Teacher Organization IncorporatedEdmond | Form 990-EZ | $38,688FY2025 |
| Women Empowering Nations IncTulsa | Form 990-N | No figure |
| Po Hi Steppers Booster ClubPonca City | Form 990-N | No figure |
| Parent Booster USA IncOklahoma City | Form 990-EZ | $37,513FY2025 |
| The Oklahoma Foundation for the Education of Deaf Children andSulphur | Form 990-N | No figure |
| Oklahoma Center for Wellness AssociationKiefer | Form 990-N | No figure |
| Okarche Educational FoundationOkarche | Form 990-EZ | $36,320FY2025 |
| Mustang Trails PtsoYukon | Form 990-EZ | $36,104FY2025 |
| Parent Booster USA IncSapulpa | Form 990-N | No figure |
| Mustang Horizon Intermediate PtsoYukon | Form 990-EZ | $35,515FY2025 |
| Vinita Public Schools Educational FoundationVinita | Form 990-N | No figure |
| Newcastle Elementry Parent Teacher OrganizationNewcastle | Form 990-EZ | $33,907FY2024 |
| Collinsville Education FoundationCollinsville | Form 990-N | No figure |
| Mustang Public School FoundationMustang | Form 990-N | No figure |
| Zonta Club of Central Oklahoma Foundation IncOklahoma City | Form 990-EZ | $32,200FY2025 |