| Newton Community Educational FoundationNewton | Form 990 | $52,182FY2025 |
| Parent Booster USA IncEarlham | Form 990-EZ | $52,009FY2025 |
| Give Like CharlyDavenport | Form 990-EZ | $51,947FY2023 |
| Clear Creek Amana Fine Arts and Music EnhancersTiffin | Form 990-EZ | $51,583FY2025 |
| Move ProjectIndianola | Form 990-EZ | $51,479FY2024 |
| Decorah Rotary Club FoundationDecorah | Form 990-EZ | $50,793FY2025 |
| Cedar Heights Parents and Teachers UnitedCedar Falls | Form 990-EZ | $50,359FY2025 |
| Henry a Wallace Elementary Parent- Teacher Organization IncJohnston | Form 990-EZ | $48,959FY2025 |
| Friends of Sacred Heart SchoolBoone | Form 990-EZ | $48,500FY2026 |
| Van Buren Community School Educational FoundationKeosauqua | Form 990-N | No figure |
| Stadium Managers Scholarship FoundationWest Des Moines | Form 990-EZ | $48,367FY2025 |
| Martensdale-St Marys Booster ClubMartensdale | Form 990-EZ | $47,187FY2024 |
| Friends of the Monroe Public LibraryMonroe | Form 990-EZ | $46,506FY2026 |
| Outrun the Rays IncEpworth | Form 990-EZ | $45,876FY2026 |
| Ed-Co Learn Create CompeteEdgewood | Form 990-N | No figure |
| West Liberty Fine Arts BoostersWest Liberty | Form 990-N | No figure |
| Humble Heroes FoundationCenterville | Form 990-EZ | $45,315FY2025 |
| Chariton Booster ClubChariton | Form 990-EZ | $44,600FY2026 |
| Ortner Scholarship FoundationCharter Oak | Form 990 | $44,186FY2025 |
| Zeta Kappa Lamda Education FoundationAnkeny | Form 990-N | No figure |
| Joyful Sparks PreschoolAfton | Form 990-N | No figure |
| Maquoketa Athletic Boosters IncMaquoketa | Form 990-EZ | $42,743FY2026 |
| Boyer Valley Agricultural Education FoundationDunlap | Form 990-N | No figure |
| Orab Music Booster ClubSheldon | Form 990-N | No figure |
| Dardis FoundationDyersville | Form 990-N | No figure |
| Warrior PTOAlta | Form 990-EZ | $38,833FY2026 |
| Muscatine Choral BoostersMuscatine | Form 990-EZ | $37,667FY2025 |
| Waukee Vocal Music Boosters AssociationWaukee | Form 990-EZ | $37,530FY2025 |
| Gilbert Fine Arts Booster ClubGilbert | Form 990-N | No figure |
| Bettendorf Rotary Club Foundation IncLe Claire | Form 990-N | No figure |
| Ottumwa Athletic Club IncOttumwa | Form 990-EZ | $35,881FY2024 |
| PCM Community School Dristrict Foundation and EndowmentMonroe | Form 990 | $34,893FY2025 |
| Glenwood Community Band Parents AssociationGlenwood | Form 990-EZ | $34,057FY2025 |
| Jump Math IncCedar Rapids | Form 990-N | No figure |
| Mt Pleasant Public Library FoundationMount Pleasant | Form 990-N | No figure |
| South Obrien Athletic Booster Club IncPaullina | Form 990-EZ | $32,730FY2025 |
| West Central Valley ScholarshipsStuart | Form 990-N | No figure |
| Polk County I-ClubUrbandale | Form 990-EZ | $32,405FY2024 |
| Global Destiny Builders IncCedar Rapids | Form 990-N | No figure |
| Gilbert Parent Teacher OrganizationGilbert | Form 990-EZ | $32,084FY2025 |
| West Lyon School Foundation IncInwood | Form 990-N | No figure |
| PowwerCedar Falls | Form 990-N | No figure |
| West Central Valley BoostersStuart | Form 990-EZ | $30,642FY2025 |
| Joo Hyock IncorporatedDes Moines | Form 990-N | No figure |
| Roland-Story Parent Teacher OrganizationStory City | Form 990-N | No figure |
| Western Dubuque Bobcat Fine Arts Booster ClubEpworth | Form 990-N | No figure |
| Mustang Travel and Camp FoundationLe Grand | Form 990-N | No figure |
| Davenport Public Schools Booster Club IncDavenport | Form 990-EZ | $28,243FY2026 |
| Ashland Ridge Elementary PTOAnkeny | Form 990-N | No figure |
| Christine Grant Elementary School Parent Teacher Organization IncNorth Liberty | Form 990-N | No figure |