- Chinook (Population: 1,386)
- Choteau (Population: 1,781)
- Clancy (Population: 1,406)
- Colstrip (Population: 2,346)
- Columbia Falls (Population: 3,645)
- Columbus (Population: 1,748)
- Conrad (Population: 2,753)
- Crow Agency (Population: 1,552)
- Cut Bank (Population: 3,105)

