- Charleston County (S.C.). Sanitary and Drainage Commission1
- Chaves, Geronimo 1523-15741
- Cole, Jim1
- Coleman, J.T.1
- Collet, John1
- Colton, Charles B. (1831-1916) (publisher)1
- Colton, G. Woolworth (George Woolworth) 1827-1901 1
- Colton, J. H. (Joseph Hutchins) 1800-18931
- Colton, J. H. (Joseph Hutchins) 1800-1893 1
- Comberford, Nicholas, fl. 1645-16651
- Conder, Thomas 1746 or 1747-1831 (Sculptor)1
- Confederate States of America Army Corps of Engineers1
- Confederate States of America. Army1
- Control by C.B. Kendall.1
- Control by Coast and Geodetic Survey1
- Control by Sledge Tatum, Albert Pike and Oscar Jones1
- Cook, James1
- Cooper, Robert, active 1795-1836 (Cartographer)1
- Cowley, R. (Cartographer)1
- Cram, George Franklin, 1841-1928 (Engraver and publisher)1