Cook County Townships
- Bloom
- Bremen
- Calumet
- Lemont
- Orland
- Palos
- Rich
- Thornton
- Worth
Cook County Towns
- Alpine
- Alsip
- Blue Island
- Bridgeview
- Burnham
- Calumet City
- Calumet Park
- Chicago Heights
- Chicago Ridge
- Country Club Hills (previously Coopers Grove)
- Crestwood
- Dixmoor
- Dolton
- East Hazel Crest
- Evergreen Park
- Flossmoor
- Ford Heights (Previously East Chicago Heights)
- Glenwood
- Harvey
- Hastings
- Hazel Crest
- Hickory Hills
- Hometown
- Homewood
- Lansing
- Lemont
- Lynwood
- Markham
- Matteson
- Merrionette Park
- Midlothian
- Oak Forest
- Oak Lawn
- Olympia Fields
- Orland Hills
- Orland Park
- Palos Heights
- Palos Hills
- Palos Park
- Park Forest
- Phoenix
- Posen
- Pullman area of Chicago
- Richton Park
- Riverdale
- Robbins
- Roseland area of Chicago
- Sauk Village
- South Chicago Heights
- South Holland
- Steger
- Thornton
- Tinley Park
- Westhaven
- Willow Springs
- Worth
Will County Townships
- Crete
- Frankfort
- Green Garden
- Homer
- Manhattan
- Monee
- New Lenox
- Peotone
- Washington
- Will
- Wilton
Will County Towns
- Andres
- Asbury Hills
- Beecher
- Bemes/Bemis
- Brisbane
- Crete
- Eagle Lake
- Endor
- Faithorn
- Frankfort
- Frankfort Square
- Goodenow
- Goodings Grove
- Green Garden (township-no towns)
- Homer Glen
- Lincoln Estates
- Lincoln Fields
- Manhattan
- Marley
- Mokena
- Monee
- New Lenox
- Peotone
- Spencer
- Twelve Mile Grove
- University Park (previously Park Forest South)
- Wallingford
- Will (township—no towns)
- Wilton Center