| Illinois Congress of Parents TeachersAurora | Form 990-EZ | $33,618FY2025 |
| German American Apprenticeship & Education FoundationChicago | Form 990-N | No figure |
| Rockland Family AssociationLibertyville | Form 990-EZ | $33,333FY2025 |
| Rotary Club of McHenry Charitable Foundation IncMcHenry | Form 990-N | No figure |
| Dakota 201 Parent Teacher OrganizationDakota | Form 990-EZ | $33,290FY2025 |
| PTO IL Ofallon Estelle KampmeyerO'Fallon | Form 990-EZ | $33,234FY2026 |
| Huntley High School Band BoostersHuntley | Form 990-N | No figure |
| Unit 2 PTA IncBonfield | Form 990-EZ | $33,107FY2026 |
| West Carroll Educational Foundation IncSavanna | Form 990-N | No figure |
| Rock Island-Milan Boosters ClubRock Island | Form 990-EZ | $32,920FY2025 |
| Society of American Military Engineers Lake Michigan PostChicago | Form 990-N | No figure |
| Healthcare Information & Management Systems Society FoundationChicago | Form 990 | $32,837FY2022 |
| Lundahl Parent Teacher OrganizationCrystal Lake | Form 990-N | No figure |
| Sango AssociationNaperville | Form 990-N | No figure |
| Alula Dream FoundationWheaton | Form 990-N | No figure |
| Richmond Grade School Parent Teacher Organization IncorporatedRichmond | Form 990-EZ | $32,603FY2025 |
| Tony Laughlin Memorial Fund Inc NFPArlington Heights | Form 990-EZ | $32,414FY2025 |
| Oswego Foundation for Educational ExcellenceOswego | Form 990-N | No figure |
| Joliet Township Athletic Booster ClubJoliet | Form 990-EZ | $32,108FY2026 |
| Alice Gustafson School Parent-Teacher OrganizationBatavia | Form 990-N | No figure |
| Bullfish NFPHarrisburg | Form 990-N | No figure |
| John a Bannes P T OTinley Park | Form 990-EZ | $31,815FY2025 |
| Peoria County Farm Bureau FoundationPeoria | Form 990-N | No figure |
| District 90 PTD PresidentsO'Fallon | Form 990-EZ | $31,716FY2024 |
| Royalteer Productions NFPKewanee | Form 990-N | No figure |
| Think Freely Media IncChicago | Form 990-N | No figure |
| West Parent OrganizationCrystal Lake | Form 990-EZ | $31,193FY2026 |
| Indian Creek Education Foundation IncShabbona | Form 990-N | No figure |
| Peotone PTOFrankfort | Form 990-EZ | $30,928FY2025 |
| East Maine School District 63 FoundationDes Plaines | Form 990-N | No figure |
| Meadow View Elementary PTOPlainfield | Form 990-N | No figure |
| Associated Colleges of the Chicago AreaNaperville | Form 990-N | No figure |
| Iqra Orphanage Education FoundationSpringfield | Form 990-N | No figure |
| Latinao Studies AssociationEvanston | Form 990-N | No figure |
| Lisle High School Booster ClubLisle | Form 990-N | No figure |
| Mannheim Educational FoundationFranklin Park | Form 990-EZ | $29,896FY2025 |
| Rochelle Elementary School District 231 PTORochelle | Form 990-EZ | $29,776FY2025 |
| Heritage Community 8 PTCHomer | Form 990-N | No figure |
| Illinois Congress of Parents TeachersAurora | Form 990-N | No figure |
| Gary D Wright PTO IncHampshire | Form 990-EZ | $29,396FY2026 |
| Christopher Quon Memorial FoundationLake Forest | Form 990-N | No figure |
| Black and Gold InitiativeChampaign | Form 990-EZ | $29,382FY2025 |
| Association of South Asian Real Estate ProfessionalsDes Plaines | Form 990-N | No figure |
| Reach for the Stars NFPChicago | Form 990-EZ | $29,279FY2025 |
| St Elmo Educational FoundationSaint Elmo | Form 990-N | No figure |
| Renfro Parent and Staff Organization IncCollinsville | Form 990-N | No figure |
| Ivy Pearl FoundationEvanston | Form 990-N | No figure |
| Freeburg Elementary School Parent Teacher OrganizationFreeburg | Form 990-EZ | $28,170FY2025 |
| Parent Booster USA IncShorewood | Form 990-EZ | $28,152FY2025 |
| Jack Brokaw Trade School Scholarship FundBiggsville | Form 990-N | No figure |