- Silver Cliff
- Silver Dollar Island
- Silver Heights
- Silver Plume
- Silver Springs
- Silver Springs
- Silver Spruce
- Silverthorne
- Silverton
- Simla
- Simpson
- Singleton
- Sinnard
- Skinners
- Sky Village
- Slate Creek
- Slater
- Slater
- Slavonia
- Slick Rock
- Sloan
- Smeltertown
- Smith Hill
- Smith Place
- Snow Water Springs
- Snowmass
- Snowmass
- Snowmass Village
- Snyder
- Somerset