Illinois Neighborhoods S
- Sauganash (5)
- Scots Plains (1)
- Scottsdale (2)
- Signal Hill (5)
- Smith Park (38)
- South Deering (4)
- South East Villages (5)
- South End (2)
- South Farnsworth (7)
- South Loop (410)
- South Shore (146)
- South Side (5)
- Southeast Aurora (4)
- Southeast Elgin-Cook (5)
- Southeast Elgin-Kane (2)
- Southwest Elgin (3)
- Southwest Rockford (6)
- Spring Brook Crossing (1)
- Spring Brook Prairie Forest Preserve (1)
- St Pat's (4)
- Stephens Park (1)
- Still Water (7)
- Streeterville (310)