Barrios de Illinois S
- Sauganash (1)
- Saukie (1)
- Schorsch Village (1)
- Scots Plains (1)
- Scottsdale (5)
- Signal Hill (3)
- Smith Park (36)
- South Deering (3)
- South East Villages (5)
- South End (2)
- South Farnsworth (6)
- South Loop (303)
- South Pointe (1)
- South Shore (173)
- South Side (3)
- Southeast Aurora (3)
- Southeast Elgin-Cook (12)
- Southeast Elgin-Kane (5)
- Southwest Elgin (6)
- Southwest Rockford (16)
- Spring Brook Crossing (2)
- Spring Brook Golf Course (9)
- St Mary's (5)
- St Pat's (3)
- Stephens Park (1)
- Still Water (5)
- Streeterville (224)