USS Catskill, a 1335-ton Passaic class monitor, was built at Greenpoint, New York. She was commissioned in late February 1863 and almost immediately sent to join the South Atlantic Blockading Squadron off Charleston, South Carolina. Catskill was damaged by Confederate gunfire during the 7 April 1863 attack on Fort Sumter that demonstrated both the strengths of well-defended fortifications and the limitations of monitor-type ironclads. The ship participated in renewed bombardments of Charleston's defenses in July-September and was again damaged. Her commanding officer, Captain George W. Rodgers, was killed in action on 17 August 1863 during one of these battles.

Catskill remained on duty in the vicinity of Charleston during the rest of the Civil War. She destroyed the grounded blockade runner Prince Albert off Fort Moultrie on 9 August 1864. When Charleston fell on 17-18 February 1865, Catskill captured blockade runners Celt and Deer when they went aground trying to escape to sea. In July 1865, some months after the conflict's end, the monitor left Charleston and went to Philadelphia, Pennsylvania, where she was decommissioned.

Catskill was briefly renamed Goliath in June-August 1865, while laid up. She was again active in 1876-77, operating along the Atlantic Coast, but was "in ordinary" for more than two decades after that. Recommissioned in April 1898, during the Spanish-American War, Catskill was assigned to coast-defense service off New England. She decommissioned in September 1898 and was sold in December 1901.