All Sonic Locations - Illinois
- Algonquin
- Anna
- Aurora
- Bartlett
- Belleville
- Belvidere
- Carbondale
- Carlinville
- Centralia
- Champaign
- Collinsville
- Columbia
- Country Club Hills
- Du Quoin
- East Alton
- East Peoria
- Edwardsville
- Freeport
- Godfrey
- Harrisburg
- Highland
- Jacksonville
- Jerseyville
- Lake Zurich
- Lockport
- Marion
- Mattoon
- Metropolis
- Moline
- Montgomery
- Mount Vernon
- O'fallon
- Pekin
- Peoria
- Quincy
- Savoy
- Silvis
- Springfield
- Swansea
- Taylorville
- Vandalia
- Waterloo
- West Frankfort