USS Ibex (1863) was a steamer acquired by the Union Navy during the American Civil War. She was to be used as a gunboat by the Navy, although the war ended less than a week (9 April 1865) after she was commissioned. Ibex, a tinclad, side-wheel gunboat formerly called Ohio Valley, was built at Harmar, Ohio, in 1863 and was purchased by the Navy at Cincinnati, Ohio, from Theodore Johnson on 10 December 1864. It was commissioned at Mound City, Illinois on 4 April 1865, Lt. Comdr. R. L. May in command.