| Classics Booster ClubWheaton | Form 990-EZ | $86,455FY2025 |
| Jac Education FoundationHighland Park | Form 990-EZ | $86,039FY2024 |
| Waterloo High School Bulldogs Athletic Booster ClubWaterloo | Form 990 | $85,758FY2024 |
| Lyons Township High School Booster ClubLa Grange | Form 990-EZ | $85,739FY2025 |
| Fca Conferences LLCOakbrook Terrace | Form 990-EZ | $85,259FY2024 |
| Friends of KenwoodChicago | Form 990-EZ | $85,159FY2024 |
| Glenbard West Boosters Club IncGlen Ellyn | Form 990-EZ | $84,998FY2026 |
| Theta Mu Lambda Charitable FoundationChicago Heights | Form 990-EZ | $84,913FY2025 |
| Triopia Public Schools FoundationAlton | Form 990 | $84,712FY2025 |
| Prairie Ridge High School Booster Club IncCrystal Lake | Form 990-EZ | $84,504FY2025 |
| Center for Success for High Need Schools IncLake Barrington | Form 990-EZ | $84,484FY2025 |
| Friends of the Peoria Public LibraryPeoria | Form 990-EZ | $84,300FY2025 |
| Monroe County Extension & 4-H Education FoundationWaterloo | Form 990-EZ | $84,279FY2025 |
| Accreditation Committee-Perfusion EducationWestern Springs | Form 990-EZ | $83,811FY2025 |
| Effingham High School Band Booster CorporationEffingham | Form 990-EZ | $83,672FY2025 |
| Northwest Illinois Foot & Ankle FoundationSycamore | Form 990-EZ | $83,446FY2025 |
| Go Club Foundation NFPElmhurst | Form 990-EZ | $83,415FY2025 |
| Hampshire Whip-Purs Athletic Booster ClubHampshire | Form 990-EZ | $83,185FY2024 |
| Effingham Unit 40 Educational FoundationEffingham | Form 990-EZ | $82,868FY2025 |
| Parent Teacher Organization of Arnett C Lines SchoolBarrington | Form 990-EZ | $82,712FY2026 |
| Illinois Council on the Teaching of Foreign LanguagesOglesby | Form 990-EZ | $82,554FY2025 |
| Singles Pleasing the Lord IncWest Chicago | Form 990-EZ | $82,480FY2024 |
| Quincy Freedom Fest IncQuincy | Form 990-EZ | $82,258FY2025 |
| Farmers Bakers & ArtistsPetersburg | Form 990-EZ | $81,960FY2025 |
| Illinois Congress of Parents TeachersDowners Grove | Form 990-EZ | $81,693FY2025 |
| Belleville West Marching Maroons Band Parents AssociationBelleville | Form 990-EZ | $81,653FY2024 |
| Friends of Community High School District 218 Education FoundationOak Lawn | Form 990-EZ | $81,506FY2025 |
| Global Korean Nursing Foundation IncNorthbrook | Form 990-EZ | $81,421FY2025 |
| Medina Ramos Global Education GroupBurbank | Form 990-EZ | $81,390FY2025 |
| Plainfield Central Elementary PTO IncPlainfield | Form 990-EZ | $81,172FY2025 |
| Baitul Ateeq Learning Center IncChicago | Form 990-EZ | $81,016FY2024 |
| Promise CouncilBloomington | Form 990-EZ | $80,886FY2025 |
| Adler Family AssociationLibertyville | Form 990-EZ | $80,546FY2025 |
| American Initiative for Education in India IncNaperville | Form 990-EZ | $80,478FY2025 |
| Westmoor Parent Teacher OrganizationNorthbrook | Form 990-EZ | $80,200FY2025 |
| Illinois Science Teaching AssociationJacksonville | Form 990-EZ | $79,907FY2025 |
| Copeland Family AssociationLibertyville | Form 990-EZ | $79,811FY2025 |
| Parent Booster USA IncOswego | Form 990-EZ | $79,416FY2025 |
| Batavia Music BuffsBatavia | Form 990-EZ | $79,363FY2026 |
| Lemont SD 113A Parent Teacher OrganizationLemont | Form 990-EZ | $79,048FY2025 |
| Princeton High School Music BoostersPrinceton | Form 990-EZ | $78,855FY2026 |
| Dundee Township Rotary FoundationDundee | Form 990-EZ | $78,827FY2025 |
| Delta Sigma Boule FoundationOlympia Fields | Form 990-EZ | $78,730FY2025 |
| Gibson City-Melvin-Sibley Booster Club IncGibson City | Form 990-EZ | $78,688FY2025 |
| Brook Park Council of Parents & TeachersLa Grange Park | Form 990-EZ | $78,343FY2025 |
| Pehs Band BoostersPlainfield | Form 990-EZ | $78,252FY2026 |
| Parent Booster USA IncFrankfort | Form 990-EZ | $78,248FY2025 |
| Romeoville High School Band Booster AssociationRomeoville | Form 990-EZ | $78,000FY2025 |
| R O W V A Public Schools FoundationAltona | Form 990-EZ | $77,929FY2026 |
| Magura Cultural Center NFPArlington Heights | Form 990-EZ | $77,839FY2025 |