The first USS Montauk was a single-turreted monitor in the Union Navy during the American Civil War. It saw action throughout the war and was used as the floating prison for the conspirators in the Abraham Lincoln assassination and was the site of the autopsy and identification of assassin John Wilkes Booth. Montauk was built by John Ericsson at Continental Iron Works, Greenpoint, Brooklyn; launched on 9 October 1862; and commissioned at New York on 14 December 1862, Commander John L. Worden in command.