We have so far registered 92,376 seafarers
| Name | Born | Place of birth (place of living shown if missing) | | Larcy Edward Clark | June 7, 1925 | Born in Dayton | |
| William Clay | | | |
| Elliot Coalidge | | Lived in USA | |
| Guiseppe Patrick Coco | February 25, 1923 | Born in Brooklyn | |
| Edward W. Coffin | October 8, 1923 | Born in Nantucket | |
| Elmer Colburn | April 28, 1922 | Born in Portland, Maine | |
| Benjamin Frank Coleman | November 16, 1928 | Born in Birmingham | |
| Manley Wilson Cole | 1895 | Lived in New Hampton, New Hampshire | |
| Marvin Coleman | August 21, 1925 | Born in Vinita, Oklahoma | |
| Charles Collins | July 17, 1923 | Born in Cleveland | |
| Agapitio Colon | March 24, 1902 | Born in Puerto Rico | |
| Christoffer Columbus | May 17, 1904 | Born in New York | |
| Robert Connoley | 1885 | Lived in Boston | |
| Joseph Conrad | April 9, 1915 | Born in New Orleans | |
| John Copeland | November 7, 1921 | Born in Marion, Ohio | |
| Paul Cordero | July 13, 1920 | Born in Puerto Rico | |
| Sydney Lowell Cordiner | September 7, 1921 | Born in Astoria | |
| George Arthur Cordova | June 3, 1927 | Born in Martinez | |
| Robert Coren | | | |
| Arthur B. Corliss | July 12, 1925 | Born in Portland | |
| John Cornell | March 13, 1922 | Born in Nanticoke | |
| Gustine Santos Costa | June 14, 1918 | Born in Rodeo | |
| Robert Costa | May 17, 1927 | Born in California | |
| Donald Coughlin | April 20, 1920 | Born in Dorchester | |
| Wallace Coward | | Lived in Sylvia Box 102, N. Carl. | |
