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- Caleb Carr
- John Dickson Carr: The Exploits of Sherlock Holmes (1954) collaboration with Adrian Conan Doyle
- Philip J. Carraher: Alias Simon Hawkes: The Further adventures of Sherlock Holmes in New York (2003), Sherlock Holmes in New York: The adventure of the New York Ripper (2005)
- Michael Chabon: The Final Solution features an unnamed elderly Sherlock Holmes
- Arthur Chapman: "The Unmasking of Sherlock Holmes" in The Game is Afoot: Parodies, Pastiches and Ponderings of Sherlock Holmes, Marvin Kaye editor
- Ian Alfred Charnock: "The Elementary Cases of Sherlock Holmes", "Watson's Last Case"
- Dewey Cheatum: Novel Case of the Twisted Heir. (2008)
- F. P. Cillie: "The Adenture of the Green Empress" in The Further Adventures of Sherlock Holmes (1985)
- Ronan Coghlan: Sherlock Holmes and the Heir of Albion
- Michael Collins: "Cross of Gold" in Sherlock Holmes: The Hidden Years, 2004
- Jason Cooke: Sherlock Holmes and the Morphine Gambit
- Paul Cornell: "The Deer Stalker"
- Bert Coules: the scripts/story boards for the BBC show The Further Adventures of Sherlock Holmes
- Jon Courtenay Grimwood: "The Spy's Retirement"
- Arthur Byron Cover: An East Wind Coming (1979?)
- Mitch Cullin: A Slight Trick of the Mind
Read more about this topic: List Of Authors Of New Sherlock Holmes Stories