Towns
| State | City/Town | Town Title |
|---|---|---|
| South Dakota | Carthage | Carthage, SD |
| South Dakota | Castlewood | Castlewood, SD |
| South Dakota | Cavour | Cavour, SD |
| South Dakota | Centerville | Centerville, SD |
| South Dakota | Chadron | Chadron, SD |
| South Dakota | Chamberlain | Chamberlain, SD |
| South Dakota | Chancellor | Chancellor, SD |
| South Dakota | Cherry Creek | Cherry Creek, SD |
| South Dakota | Chester | Chester, SD |
| South Dakota | Claire City | Claire City, SD |
| South Dakota | Claremont | Claremont, SD |
| South Dakota | Clark | Clark, SD |
| South Dakota | Clear Lake | Clear Lake, SD |
| South Dakota | Colman | Colman, SD |
| South Dakota | Colome | Colome, SD |
| South Dakota | Colton | Colton, SD |
| South Dakota | Columbia | Columbia, SD |
| South Dakota | Conde | Conde, SD |
| South Dakota | Corona | Corona, SD |
| South Dakota | Corsica | Corsica, SD |
| South Dakota | Cresbard | Cresbard, SD |
| South Dakota | Crooks | Crooks, SD |
| South Dakota | Custer | Custer, SD |
| South Dakota | Dallas | Dallas, SD |
| South Dakota | Dante | Dante, SD |