Places
- Cleveland (Ohio)1
- Cloudcroft (N.M.)1
- Cologne (Germany)1
- Colorado River (Colo.-Mexico)1
- Colorado Springs (Colo.)1
- Columbia River.1
- Columbiaville (Mich.)1
- Coney Island (New York, N.Y.)1
- Confederated Salish & Kootenai Tribes of the Flathead Reservation, Montana.1
- Constantine (Algeria)1
- Corfu Island (Greece)1
- Cowlitz River (Wash.)1
- Crater Lake (Or.)1
- Cripple Creek (Colo.)1
- Croton Aqueduct (N.Y.)1
- Crow Creek Indian Reservation (S.D.)1
- Crow Creek Sioux Tribe of the Crow Creek Reservation, South Dakota1
- Crystal Lake (Marquette County, Wis. : Lake)1
- Crystal River (Colo.)1
- Crystal River Valley (Colo.)1