Colu - Conn
- Columbia
- Columbia Broadcasting System
- Columbia College
- Columbia Encyclopedia
- Columbia Glacier
- Columbia Journalism Review
- Columbia Pictures
- Columbia Plateau
- Columbia River
- Columbia Sportswear Company
- Columbia University
- Columbia-Sinkiuse
- Columbus
- Columbus Circle
- Columbus Day
- Columbus Metropolitan Library
- Colville
- Colville Reservation
- Colville River
- Comanche
