| Humboldt Music Boosters IncHumboldt | Form 990-EZ | $75,926FY2026 |
| Friends of the Cedar Rapids Public LibraryCedar Rapids | Form 990-EZ | $74,709FY2025 |
| Loess Hills Agriculture in the ClassroomHarlan | Form 990-EZ | $74,151FY2025 |
| Clinical Legal Education AssociationDes Moines | Form 990-EZ | $73,005FY2025 |
| Garcia Farm IncGoldfield | Form 990-EZ | $72,607FY2025 |
| Norman Borlaug Heritage FoundationCresco | Form 990-EZ | $72,020FY2025 |
| Mission Starfish HaitiDavenport | Form 990-EZ | $71,960FY2025 |
| Skip & Jean Christensen Foundation IncHumboldt | Form 990 | $71,750FY2025 |
| Anamosa Music BoostersAnamosa | Form 990-EZ | $71,643FY2026 |
| Woodward Granger Community School District Foundation IncGranger | Form 990 | $71,495FY2025 |
| Ankeny Community School District FoundationAnkeny | Form 990-EZ | $71,018FY2026 |
| Fairfield Trojans Athletic BoostersFairfield | Form 990-EZ | $70,398FY2023 |
| Friends of the Esthervile Public LibraryEstherville | Form 990 | $70,339FY2025 |
| Southeast Polk Education Foundation IncAltoona | Form 990-EZ | $69,108FY2025 |
| South Winneshiek Education FoundationOssian | Form 990-EZ | $69,083FY2025 |
| Viking Booster ClubAvoca | Form 990-EZ | $68,856FY2026 |
| Emmetsburg Educational FoundationEmmetsburg | Form 990-EZ | $68,737FY2025 |
| Self-Realization FoundationFairfield | Form 990-EZ | $68,594FY2024 |
| L-S Community Education FoundationSully | Form 990-EZ | $68,198FY2025 |
| Baxter Athletic BoostersRhodes | Form 990-EZ | $68,067FY2022 |
| Parent Booster USA IncGriswold | Form 990-EZ | $68,022FY2026 |
| North Iowa Libraries CollaboratingBritt | Form 990-EZ | $67,847FY2025 |
| Independent School Association of Eastern Iowa School Tuition OrgCedar Rapids | Form 990-EZ | $66,395FY2024 |
| Peosta Elementary ParentsPeosta | Form 990-EZ | $66,306FY2025 |
| Tri Center Scholarship Foundation IncMinden | Form 990 | $65,832FY2025 |
| West Lyon Ffa Booster Club IncInwood | Form 990-EZ | $65,602FY2025 |
| Parent Booster USA IncTruro | Form 990-EZ | $65,365FY2025 |
| Ann Rehan Goebel FoundationSioux City | Form 990-EZ | $65,148FY2025 |
| Waukee Band Parents OrganizationWaukee | Form 990-EZ | $65,012FY2025 |
| Iowa State Acacia Chapter FoundationAnkeny | Form 990 | $63,519FY2025 |
| Turkey Valley Education FoundationCresco | Form 990-EZ | $63,257FY2025 |
| Hugging Tree Nature PreschoolWaterloo | Form 990-EZ | $62,735FY2025 |
| Oskaloosa Indian Booster Club LtdOskaloosa | Form 990-EZ | $62,161FY2024 |
| Kennedy Booster ClubCedar Rapids | Form 990-EZ | $61,236FY2025 |
| Rock Creek PTOAnkeny | Form 990-EZ | $60,854FY2026 |
| East Marshall Booster ClubLe Grand | Form 990-EZ | $59,665FY2026 |
| Alburnett Community School District FoundationAlburnett | Form 990-EZ | $59,230FY2025 |
| Quota of the Cedar Valley IncWaterloo | Form 990-EZ | $58,033FY2025 |
| Inwood Christian School Society Foundation IncInwood | Form 990 | $58,015FY2025 |
| Central Lee Ffa Foundation IncDonnellson | Form 990-EZ | $57,725FY2025 |
| Pay It Forward Scholarship FoundationWinterset | Form 990-EZ | $56,605FY2025 |
| Hudson Educational FundHudson | Form 990 | $55,914FY2025 |
| Panorama Booster ClubPanora | Form 990-EZ | $54,848FY2025 |
| Friends of the Grimes PublicGrimes | Form 990-EZ | $54,847FY2025 |
| Decorah Music BoostersDecorah | Form 990-EZ | $54,470FY2025 |
| Parents and Boosters Athletic Club of Davenport North High School IncDavenport | Form 990-EZ | $54,311FY2025 |
| Anderson Elementary PTOBondurant | Form 990-EZ | $53,806FY2025 |
| Urbandale Education FoundationUrbandale | Form 990-EZ | $53,398FY2025 |
| Pathways Planning & Insights IncDavenport | Form 990-EZ | $52,604FY2025 |
| Vocal Boosters of EmmetsburgEmmetsburg | Form 990-EZ | $52,574FY2024 |