| South Carolina Congress of Parents and TeachersColumbia | Form 990-EZ | $53,613FY2026 |
| Parent Booster USA IncColumbia | Form 990-EZ | $53,204FY2026 |
| Pleasant Knoll Middle School PTOFort Mill | Form 990-EZ | $52,633FY2026 |
| Friends of Kershaw County Library IncCamden | Form 990-EZ | $52,334FY2026 |
| Foundation for Professional DevelopmentWest Columbia | Form 990-EZ | $51,670FY2026 |
| Bethel Elementary PTOClover | Form 990-EZ | $51,658FY2025 |
| South Carolina Beekeepers AssociationLexington | Form 990-EZ | $51,648FY2025 |
| Legacy Homeschool AcademyAnderson | Form 990-EZ | $51,544FY2026 |
| Dacusville Community Club of South CarolinaEasley | Form 990-EZ | $50,936FY2024 |
| Pockets of PeaceSimpsonville | Form 990-EZ | $50,777FY2025 |
| Jesse Boyd Parent Teacher Organization IncSpartanburg | Form 990-EZ | $49,684FY2025 |
| Friends of the Lexington Branch LibraryLexington | Form 990-EZ | $49,473FY2025 |
| Concrete Primary School PtsoEasley | Form 990-N | No figure |
| Lucy T Davis Elementary PTOFlorence | Form 990-EZ | $49,372FY2025 |
| Amhs Partners in EducationNorth Charleston | Form 990-EZ | $49,210FY2026 |
| Cherry Park Elementary School PTORock Hill | Form 990-EZ | $48,907FY2026 |
| Round Top Elementary Parent-Teacher OrganizationBlythewood | Form 990-EZ | $48,376FY2025 |
| Oakland Elementary PTOCharleston | Form 990-EZ | $48,240FY2026 |
| Myrtle Beach Intermediate PTOMyrtle Beach | Form 990-EZ | $47,542FY2025 |
| Columbia Electrical CouncilWest Columbia | Form 990-EZ | $47,466FY2025 |
| Howard High School Alumni AssociationGeorgetown | Form 990-N | No figure |
| Carolina Elementary School Ed FoundationHartsville | Form 990-EZ | $47,349FY2025 |
| Parent Booster USA IncBlythewood | Form 990-EZ | $47,250FY2025 |
| Clinton High School Booster ClubClinton | Form 990-N | No figure |
| Laurens District 55 Band BoostersLaurens | Form 990-EZ | $46,756FY2026 |
| Okatie Elementary School PTOOkatie | Form 990-EZ | $46,112FY2025 |
| Waccamaw Intermediate School Parent Teacher OrganizationPawleys Island | Form 990-N | No figure |
| Bridging the Gap AdvocacyLaurens | Form 990-N | No figure |
| Ten Oaks Elementary PTOMyrtle Beach | Form 990-N | No figure |
| Powdersville Elementary PtsoGreenville | Form 990-N | No figure |
| Pleasant Knoll Middle School Athletic Booster ClubFort Mill | Form 990-EZ | $44,473FY2026 |
| Knights Parent GuildCharleston | Form 990-EZ | $44,309FY2025 |
| George Rogers Foundation of the Carolinas IncColumbia | Form 990-N | No figure |
| Zack Van Landingham Scholarship FundHilton Head | Form 990-N | No figure |
| South Carolina Litter Control AssociationColumbia | Form 990-N | No figure |
| PTA South Carolina CongressSullivans Island | Form 990-N | No figure |
| Omegas of Kershaw County Foundation IncElgin | Form 990-N | No figure |
| Oconee County Education FoundationWest Union | Form 990-N | No figure |
| Brockman Elementary PTOColumbia | Form 990-EZ | $41,090FY2026 |
| Touchdown Club of Sumter IncSumter | Form 990-N | No figure |
| Abbeville High School Booster ClubAbbeville | Form 990-N | No figure |
| Bowens Corner Elementary PTOHanahan | Form 990-N | No figure |
| Springdale Elementary School PTAWest Columbia | Form 990-N | No figure |
| Fort Dorchester Afjrotc Booster ClubNorth Charleston | Form 990-N | No figure |
| Orangeburg Touchdown ClubOrangeburg | Form 990-N | No figure |
| Dixie High School Athletic Booster ClubDue West | Form 990-EZ | $39,403FY2026 |
| Hanahan Middle School Parent Teacher OrganizationHanahan | Form 990-N | No figure |
| Mission Development Ministries IncAnderson | Form 990-N | No figure |
| C I L CWinnsboro | Form 990-N | No figure |
| Dacusville Elementary School PTO IncEasley | Form 990-N | No figure |