USS Gulfport (AK-5) was a cargo ship acquired by the U.S. Navy for service in World War I. Gulfport, formerly SS Locksun, ex-SS Andree Rickmers, was built at Bremerhaven, Germany, in 1902 by Rickmers Aktiengesellschaft and was owned by the German Norddeutscher Lloyd Steamship Lines Co.

In Pearl Harbor, when the United States entered World War I, she was seized by government orders and converted to a cargo transport at the Honolulu Navy Yard.

In company with four submarines, Gulfport sailed from Hawaii on 30 October 1917, reaching New York 28 January 1918 via San Diego, California, Corinto, Nicaragua, Balboa, Key West, Florida, and Norfolk, Virginia.

Until she decommissioned in 1922, Gulfport served as a cargo ship linking New York and Charleston with various Caribbean ports, particularly Guantanamo, Cuba; St. Thomas, Virgin Islands; Port-au-Prince, Haiti; and Santo Domingo, Dominican Republic.

During this period she made a total of 23 round trips to the West Indies, carrying oil and other necessary supplies to American troops based there and frequently returning with a cargo of sugar from the islands.