- Clayton, Georgia
- Clayton, New Jersey
- Clayton, North Carolina
- Clearfield, Utah
- Clearwater Beach, Florida
- Cleburne, Texas
- Clemmons, North Carolina
- Clemson, South Carolina
- Cleveland, Georgia
- Cleveland, Mississippi
- Cleveland, Ohio
- Cleveland, Tennessee
- Cleves, Ohio
- Clewiston, Florida
- Clifton, Virginia
- Clovin, New Mexico
- Cochran, Georgia
- Cocoa Beach, Florida
- Cody, Wyoming
- Coeur d'Alene, Idaho
- Colchester, Vermont
- Colcord, Oklahoma
- College Grove, Tennessee
- College Park, Georgia
- College Park, Maryland
- College Park, Pennsylvania
- College Station, Texas
- Colleyville, Texas
- Collierville, Tennessee
- Colorado City, Texas
- Colorado Springs, Colorado
- Columbia, Maryland
- Columbia, Missouri
- Columbia, South Carolina
- Columbia, Tennessee
- Columbus, Georgia
- Columbus, Indiana
- Columbus, Nebraska
- Columbus, Ohio
- Commack, New York
