Places beginning with ST in Illinois, United States
- Stagecoach Hills
- Stagecoach Junction
- Staley
- Stallings
- Standard
- Standard City
- Stanford
- Stanford, Township of
- Stanton, Township of
- Staples Corner
- Star City
- Stark
- Stark County
- Starks
- Starne
- State Park Place
- State Road
- Stateway Gardens (subdivision)
- Staunton
- Staunton, Township of
- Stavanger
- Steel City
- Steele
- Steeleville
- Steeleville Election Precinct
- Steeleville Precinct
- Steelton
- Steger
- Stelle
- Stephenson County
- Sterling
- Sterling Place
- Sterling, Township of
- Steuben, Township of
- Stevenson, Township of
- Steward
- Stewardson
- Stewardsville (historical)
- Stewart Ridge (subdivision)
- Stickney
- Stickney, Township of
- Stillman Valley
- Still Meadows
- Stillwell
- Stiritz
- Stites, Township of
- Stockdale
- Stockland
- Stockland, Township of
- Stockton
- Stockton, Township of
- Stoehrs
- Stokes
- Stokes Election Precinct
- Stolle
- Stolletown
- Stone Church
- Stone Church Election Precinct
- Stonefort
- Stone Fort
- Stonefort, Township of
- Stone Park
- Stoneyville
- Stonington
- Stonington, Township of
- Stony Island
- Stony Island Heights (subdivision)
- Stookey, Township of
- Stoy
- Strasburg
- Stratford
- Stratton
- Stratton, Township of
- Straut
- Strawn
- Strawns Crossing
- Streadle
- Streamwood
- Streator
- Streeterville (subdivision)
- Stringtown
- Stronghurst
- Stronghurst, Township of
- Stubblefield
- Sturbridge Village
- Sturm Subdivision (subdivision)