U.S. History
- College Athletics
- Colonial
- Colonial assemblies
- colony
- Committees of correspondence
- Commodity Exchange Act
- Common School Movement
- Communist party (United States)
- Compromise of 1850
- Comstock Lode
- Conestoga wagon
- Confederacy
- Confederate States of America
- Constitutional Convention
- Constitutional Union party
- Consumerism
- Consumption (Economics)
- Continental Congress
- Conway Cabal
- Copper industry