USS Maratanza was a wooden steamer built at Boston Navy Yard and launched in 1861. She served as a gunboat in the Union Navy during the American Civil War. She supported the Peninsula Campaign of General McClellan and later participated in the bombardment of Fort Fisher. After the end of the War, she was decommissioned and in 1868 sold to a private company. She subsequently served in the Haitian Navy as a gunboat under the names Salnave and Union.