USS Catskill was a monitor built for the United States Navy during the American Civil War.

USS Catskill—a single-turreted Passaic-class monitor—was launched on December 16, 1862, by Continental Iron Works, Greenpoint, New York; outfitted at New York Navy Yard; commissioned on February 24, 1863, Commander George Washington Rodgers in command; and reported to the South Atlantic Blockading Squadron.

Catskill was damaged by Confederate gunfire during the 7 April attack on Fort Sumter that demonstrated both the strengths of well-defended fortifications and the limitations of monitor-type ironclads.

Catskill destroyed the grounded blockade runner Prince Albert off Fort Moultrie on August 9, 1864.

Repaired at New York during 1874 and 1875, Catskill joined the North Atlantic Squadron, with whom she cruised along the northeast coast from March 4, 1876 – November 5, 1877.