Illinois Regional Councils and Planning Commissions
- Bi-State Regional Commission
- Chicago Area Transportation Study
- Champaign County Regional Planning Commission
- Chicago Metropolitan Agency for Planning
- Coles County Regional Planning and Development Commission
- Danville Area Transportation Study
- Decatur Urbanized Area Transportation Study
- DeKalb Sycamore Area Transportation Study
- East Central Intergovernmental Association (Illinois-Iowa-Wisconsin)
- East-West Gateway Council of Governments (Illinois-Missouri)
- Eastern Will County Regional Council
- Greater Egypt Regional Planning and Development Commission
- Kankakee County Regional Planning Department
- Macon County Regional Planning Commission
- McLean County Regional Planning Commission
- North Central Illinois Council of Governments
- Northwest Municipal Conference
- Rockford Metropolitan Agency for Planning
- South Central Illinois Regional Planning and Development Commission
- Southeastern Illinois Regional Planning and Development Commission
- Springfield-Sangamon City Regional Planning Commission
- State Line Area Transportation Study (Illinois-Wisconsin)
- Tri-County Regional Planning Commission
- Western Illinois Regional Council
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