C
- "C-ville" – USS Chancellorsville
- "Cannabis" – USS Canopus; humorous malapropism
- "Can Opener" - USS John F. Kennedy, after collision with USS Belknap
- "Century One" – HMS Centurion; humorous malapropism
- "Christmas Anthem" – HMS Chrysanthemum; humorous malapropism
- "Chuckie V" — USS Carl Vinson
- "Cocoa Boat" – HMS Curacoa; humorous malapropism
- "Connie" – USS Constellation; diminutive of ship's name
- "The Count" - USS Comte de Grasse; named for Comte de Grasse (French, "Count de Grasse"), an ally of the Americans in the American War of Independence
- "Curious" — HMS Furious
Read more about this topic: List Of Warships By Nickname