- Sopris
- South Fork
- South Platte
- South Roggen
- Southglenn
- Spanish Village
- Spar City
- Spencer Heights
- Sphinx Park
- Spook City
- Spring Hill
- Spring Ranch
- Springdale
- Springfield
- Spruce
- Sprucedale
- Sprucewood
- Sringfield
- Stage
- Stanford
- Stanley Heights Subdivision
- Stanley Park
- Stapleton
- Starkville
- State Bridge
- Steamboat II
- Steamboat Springs
- Stelbars Lindland
- Stem Beach
- Sterling