The first USS Cimarron (officially changed from the original spelling Cimerone) was a sidewheel double-ended steam gunboat of the United States Navy that served during the American Civil War.

She was constantly employed in the coastal and inland waters of South Carolina, Georgia, and Florida, participating in the engagement with Confederate batteries up the St. Johns River, Florida (17 September 1862), and returning early in October to support army operations there during the battle of St. John's Bluff.

After repairs at the Philadelphia Navy Yard from January to April 1863, Cimarron continued blockade duty until 3 August 1865.

During this time she captured three prizes, and fired on Confederate troops ashore on two occasions (23 June and 8 July 1863).

This article incorporates text from the public domain Dictionary of American Naval Fighting Ships.