- Congaree River (S.C.)4
- Congaree, Lexington County, South Carolina, United States1
- Congaree, Richland County, South Carolina, United States1
- Congo.1
- Connecticut2
- Connecticut, United States1
- Connecticut.3
- Converse (S.C.)7
- Conway (S.C.)33
- Conway (S.C.)
1
- Conway, Horry County, South Carolina, United States2
- Cook County (Ill.)2
- Cook Engineering Laboratory2
- Cooke1
- Cool Spring, Camden, Kershaw County, South Carolina, United States2
- Cooper River1
- Cooper River (S.C.)7
- Cooper River in Berkeley County (S.C.)3
- Cooper River, Berkeley County (S.C.)26
- Cooper River, Berkeley County (SC)3