| Gateway Global FoundationDowners Grove | Form 990-EZ | $53,518FY2025 |
| Resonate JoyChicago | Form 990-EZ | $53,445FY2025 |
| Illinois Congress of Parents TeachersWheaton | Form 990-EZ | $53,390FY2025 |
| Kaneland Blackberry Elementary School Parent Teacher OrganizationElburn | Form 990-EZ | $53,238FY2025 |
| Freedom Parent Teacher OrganizationPlainfield | Form 990-EZ | $53,081FY2025 |
| Monticello Elementary PTOMonticello | Form 990-EZ | $53,066FY2023 |
| Havana Community Unit School FoundationHavana | Form 990-EZ | $53,058FY2025 |
| Illidell of Ags Educational FoundationBloomington | Form 990-EZ | $53,039FY2025 |
| Illinois Congress of Parents TeachersAurora | Form 990-EZ | $53,008FY2026 |
| Lake Forest Highschool ApplauseLake Forest | Form 990-EZ | $52,959FY2025 |
| Barat Education FoundationChicago | Form 990 | $52,959FY2025 |
| Beye School P T OOak Park | Form 990-EZ | $52,909FY2025 |
| Washington Elementary School Parent Teacher OrganizationBloomington | Form 990-EZ | $52,752FY2025 |
| Rotary Club of Hinsdale Foundation IncHinsdale | Form 990-EZ | $52,732FY2025 |
| Annie Oakley Shooters of Northern IllinoisGrayslake | Form 990-EZ | $52,707FY2025 |
| Parents and Teachers of Centennial SchoolBartlett | Form 990-EZ | $52,641FY2026 |
| Walkers Grove P T O SchoolPlainfield | Form 990-EZ | $52,632FY2025 |
| Dakota Athletic BoostersDakota | Form 990-EZ | $52,579FY2024 |
| Friends of Sullivan Athletics and AcademicsSullivan | Form 990-EZ | $52,571FY2025 |
| Shelby County Farm Bureau FoundationShelbyville | Form 990-EZ | $52,413FY2025 |
| Historic Lincoln School Alumni FoundationEdwardsville | Form 990-EZ | $52,273FY2024 |
| Friends of Brentano SchoolChicago | Form 990-EZ | $52,042FY2025 |
| West Northfield School District 31Northbrook | Form 990-EZ | $51,966FY2024 |
| Educational Opportunity Association Foundation IncChicago | Form 990 | $51,750FY2025 |
| Illinois Congress of Parents TeachersEvanston | Form 990-EZ | $51,735FY2025 |
| North Elementary School PTOCrystal Lake | Form 990-EZ | $51,551FY2025 |
| Huntley Area Public Library District Friends FoundationHuntley | Form 990-EZ | $51,536FY2025 |
| Foundation of Osteopathic Emergency MedicineWarrenville | Form 990-EZ | $51,520FY2025 |
| Chicago Principals and Adm Assoc Educational Program IncChicago | Form 990-EZ | $51,485FY2025 |
| Amity School Childrens AidRiver Forest | Form 990-EZ | $51,315FY2025 |
| Plainfield Wildcat Athletic Booster ClubPlainfield | Form 990-EZ | $51,233FY2025 |
| Caruso Middle School Parent Teacher Organization IncDeerfield | Form 990-EZ | $51,226FY2025 |
| Innovative Engineering Community FoundationChicago | Form 990-EZ | $51,131FY2025 |
| Joseph Sears School Parents Volunteer AssociationKenilworth | Form 990-EZ | $51,129FY2025 |
| Ball Chatham Glenwood Parent Teacher OrganizationChatham | Form 990-EZ | $51,071FY2025 |
| Nalanda Educational and Charitable FoundationDes Plaines | Form 990-EZ | $50,890FY2025 |
| Oak Grove School District PTO IncGreen Oaks | Form 990-EZ | $50,801FY2026 |
| District 75 PTOMundelein | Form 990-EZ | $50,386FY2025 |
| Friends of Lavic IncRockford | Form 990-EZ | $50,158FY2025 |
| Kajoma Child Prosperity Center IncChicago | Form 990-EZ | $50,140FY2025 |
| Music Education Advocates CoalitionNaperville | Form 990-EZ | $49,999FY2024 |
| District 146 Band Parents IncTinley Park | Form 990-N | No figure |
| Washington Bridge Education FoundationWashington | Form 990-EZ | $49,683FY2025 |
| The Michael Honan II FoundationTremont | Form 990-EZ | $49,488FY2025 |
| Champaign Central High School Baseball BoostersChampaign | Form 990-EZ | $49,287FY2025 |
| Friends of BrennemannChicago | Form 990-EZ | $49,246FY2025 |
| 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 |