The Colt Navy is a single action cap and ball revolver designed and manufactured by Colt. Some of the models were used in the American Civil War, in which Colt was rivaling with Remington with their popular 1858 revolver, and the Colt 1860 Army.

The Colt Revolving Belt Pistol or Navy Pistol, sometimes erroneously referred to as "Colt Revolving Belt Pistol of Naval Caliber" or "of Navy Caliber" (Naval is heavy gun and Navy Size Caliber was termed later for another Colt model), is a .36 caliber, six-round cap and ball revolver that was designed by Samuel Colt between 1847 and 1850. Colt first referred to this Revolver as the Ranger Size model, and then Revolving Belt, but the designation "Navy" quickly took over.

Famous users included Wild Bill Hickok, William Buffalo Bill Cody, John Henry "Doc" Holliday, Richard Francis Burton, Ned Kelly, Bully Hayes, Ben Pease, Blackbirders, Metis, Seth Kinman, Emir Abdelkader, Boer Commando, Bushrangers, Cowboys, Richard H. Barter, Charlie Goodnight, Robert E. Lee, Nathan B. Forrest, John O'Neill, John O'Mahony, Frank Gardiner, Ulysses S. Grant, Quantrill's Raiders, Tom Bell, Kootenay Brown, Ivan Turchin, John Coffee "Jack" Hays, "Bigfoot" Wallace, Frederick Townsend Ward, Ben McCulloch, Addison Gillespie, John "Rip" Ford, "Sul" Ross and most Texas Rangers prior to the Civil War, use continued long after more modern cartridge revolvers were introduced.

The Ottoman Empire used the revolver as late as the Russo-Turkish War of 1877–78 even though it was quite antiquated compared to the Russians' Smith & Wesson Model 3.

Fictional movie character The Man With No Name also uses a Navy conversion in The Good, the Bad and the Ugly.

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