Towns
| State | City/Town | Town Title |
|---|---|---|
| Colorado | Sedalia | Sedalia, CO |
| Colorado | Sedgwick | Sedgwick, CO |
| Colorado | Seibert | Seibert, CO |
| Colorado | Severance | Severance, CO |
| Colorado | Shawnee | Shawnee, CO |
| Colorado | Sheridan Lake | Sheridan Lake, CO |
| Colorado | Silt | Silt, CO |
| Colorado | Silver Plume | Silver Plume, CO |
| Colorado | Silverthorne | Silverthorne, CO |
| Colorado | Silverton | Silverton, CO |
| Colorado | Simla | Simla, CO |
| Colorado | Slater | Slater, CO |
| Colorado | Snowmass | Snowmass, CO |
| Colorado | Snowmass Village | Snowmass Village, CO |
| Colorado | Snyder | Snyder, CO |
| Colorado | Somerset | Somerset, CO |
| Colorado | South Fork | South Fork, CO |
| Colorado | Springfield | Springfield, CO |
| Colorado | Steamboat Springs | Steamboat Springs, CO |
| Colorado | Sterling | Sterling, CO |
| Colorado | Stoneham | Stoneham, CO |
| Colorado | Strasburg | Strasburg, CO |
| Colorado | Stratton | Stratton, CO |
| Colorado | Sugar City | Sugar City, CO |
| Colorado | Swink | Swink, CO |