USS Gemsbok (1861) was a bark acquired by the Union Navy during the American Civil War. She was used by the Navy as a gunboat, but, later in the war, she was also used as a collier and as a storeship. Gemsbok was purchased on 7 September 1861 at Boston, Massachusetts, and commissioned on 30 August 1861 at the Boston Navy Yard, Acting Volunteer Lieutenant Lewis Drake Voorhees in command.