Barrios de Illinois S
- Sauganash (2)
- Saukie (2)
- Schorsch Village (2)
- Scots Plains (2)
- Scottsdale (1)
- Sherman Street (1)
- Signal Hill (6)
- Smith Park (25)
- South Chicago (50)
- South Deering (6)
- South East Villages (4)
- South End (1)
- South Farnsworth (9)
- South Loop (285)
- South Shore (148)
- South Side (5)
- Southeast Aurora (5)
- Southeast Elgin-Cook (4)
- Southeast Elgin-Kane (1)
- Southwest Elgin (2)
- Southwest Rockford (1)
- Spring Brook Crossing (1)
- Spring Brook Golf Course (2)
- St Pat's (4)
- Stephens Park (1)
- Still Water (10)
- Streeterville (263)