USS Hyacinth (1862) was a steamer acquired by the Union during the American Civil War. She was placed into service as a tugboat, a dispatch boat, as well as a gunboat, by the Union Army and by the Union Navy. Spitfire was transferred by the U.S. War Department to the Union Navy 30 September 1862, and renamed Hyacinth 19 October. Hyacinth served the Mississippi Squadron until the end of the war. She was especially useful in operations which resulted in the fall of Vicksburg, and assisted in the salvage work which refloated Indianola.