| Champaign Central High School Baseball BoostersChampaign | Form 990-EZ | $49,287FY2025 |
| Friends of BrennemannChicago | Form 990-EZ | $49,246FY2025 |
| Association of University Radiologists Res and Ed FoundationWarrenville | Form 990-N | No figure |
| Braeside School Parent Teacher OrganizationHighland Park | Form 990-EZ | $49,118FY2026 |
| Sommer FoundationElmhurst | Form 990-EZ | $48,683FY2024 |
| Niles North Athletic Booster IncSkokie | Form 990-EZ | $48,570FY2025 |
| Union of Vietnamese Student Association of MidwestLincolnwood | Form 990-N | No figure |
| Ball-Chatham Educational FoundationChatham | Form 990-EZ | $48,484FY2025 |
| Highland Park High School Parentteacher OrganizationHighland Park | Form 990-EZ | $48,463FY2026 |
| Awards and Recognition Industry Educational FoundationSchaumburg | Form 990-N | No figure |
| Hawk PrideCarrollton | Form 990-EZ | $48,093FY2025 |
| Ottawa Township High School Boosters ClubOttawa | Form 990-EZ | $48,060FY2025 |
| Roosevelt PTOPark Ridge | Form 990 | $48,031FY2026 |
| Illinois Congress of Parents TeachersGlen Ellyn | Form 990-EZ | $48,030FY2026 |
| Polish National Alliance Educational FundChicago | Form 990 | $48,027FY2025 |
| Titan Athletic Booster Club IncEl Paso | Form 990-EZ | $47,984FY2025 |
| Morton High School Band ParentsMorton | Form 990-EZ | $47,932FY2026 |
| B UnityLombard | Form 990-N | No figure |
| Eagle Pointe Parent Teacher OrganizationPlainfield | Form 990-N | No figure |
| Maine East High School Athletic Booster ClubPark Ridge | Form 990-EZ | $47,701FY2026 |
| Dreams for KidsChicago | Form 990 | $47,433FY2025 |
| Parent Booster USA IncDunlap | Form 990-EZ | $47,391FY2026 |
| Parent Booster USA IncMundelein | Form 990-EZ | $47,210FY2025 |
| Illinois Food Retailers Education FoundationChicago | Form 990 | $47,132FY2024 |
| Illinois Congress of Parents TeachersWheaton | Form 990-EZ | $46,664FY2025 |
| Three Oaks School Parent-Teacher OrganizationCary | Form 990-EZ | $46,430FY2025 |
| Drake Dekeyrel Do It for Drake Memorial FoundationIllinois City | Form 990-EZ | $46,403FY2025 |
| Pinckneyville Community High School Dist 101 Education Foundation IncPinckneyville | Form 990-N | No figure |
| Wildcat Booster ClubWest Chicago | Form 990-EZ | $46,317FY2025 |
| Sherwood Elementary School P T OHighland Park | Form 990-EZ | $46,003FY2026 |
| Friends of Unit 4Mendon | Form 990-EZ | $45,954FY2025 |
| Lew Blond Memorial 5K Run WalkNorthbrook | Form 990-N | No figure |
| Westchester Parents and Teachers for Children IncWestchester | Form 990-EZ | $45,766FY2025 |
| Joseph E Nolan Beverly Caddy Scholarship FoundationWestern Springs | Form 990-N | No figure |
| Plainfield South High School Band BoostersPlainfield | Form 990-N | No figure |
| Mickey Hammerman Legacy Fund IncChicago | Form 990-N | No figure |
| Pioneer Elementary School Parent Teacher OrganizationBolingbrook | Form 990-EZ | $45,538FY2025 |
| Melanated Midwives NFPChicago | Form 990-N | No figure |
| Wayne Thomas PTO NFPHighland Park | Form 990-EZ | $45,123FY2026 |
| Panther Pride Foundation for Central SchoolsCamp Point | Form 990-N | No figure |
| Johnsburg Educational Partnership Foundation IncJohnsburg | Form 990 | $44,906FY2025 |
| Carpenter School PTOPark Ridge | Form 990-EZ | $44,809FY2026 |
| Illinois School District 106 Education FoundationLagrange Hlds | Form 990-EZ | $44,802FY2025 |
| Steve Maxheimer Memorial Scholarship Foundation IncPeoria | Form 990-EZ | $44,718FY2025 |
| Briar Glen Parent Teacher CouncilWheaton | Form 990-EZ | $44,460FY2026 |
| Wethersfield School Academic FoundationKewanee | Form 990-N | No figure |
| Farmingdale Elementary Parent Teacher ClubPleasant Plains | Form 990-EZ | $44,377FY2026 |
| Northpoint Elementary School PTOBloomington | Form 990-N | No figure |
| Independent Sports Club of Central IllinoisPeoria | Form 990 | $44,301FY2026 |
| Huskie Booster Club of Oak Park & River Forest High SchoolOak Park | Form 990-EZ | $44,237FY2026 |