| Silverleaf Community Development District, FL (CDD) |
| Silverstreet, SC (Town) |
| Silverthorne, CO (Town) |
| Silverton, CO (Town) |
| Silverton, OH (Village) |
| Silverton, MN (Township) |
| Silverton, TX (City) |
| Silverton, OR (City) |
| Silvesta, ND (Township) |
| Silvis, IL (City) |
| Simi Valley, CA (City) |
| Simla, CO (Town) |
| Simmesport, LA (Town) |
| Simonton, TX (City) |
| Simpson, KS (City) |
