USS Dolphin (PG-24) was a gunboat/dispatch vessel; the fourth ship of the United States Navy to share the name. Dolphin's keel was laid down by Delaware River Iron Ship Building and Engine Works of Chester, Pennsylvania. She was launched on 12 April 1884, with Captain George Dewey in command, and commissioned on 8 December 1885 with Captain R. W. Meade in command. Dolphin was the first Navy ship to fly the Flag of the President of the United States during President Chester A. Arthur's administration, and the second Navy ship to serve as a presidential yacht.