USS Morristown (ID-3580) was a cargo ship that served in the United States Navy during World War I, from 1918 to 1919.

The cargo ship SS Morristown was built by the Standard Shipbuilding Company, Shooters Island, New York, in 1918.

The U.S. Navy acquired her for World War I service from the Russian Volunteer Fleet on 18 October 1918 at Hoboken, New Jersey, assigned her the Identification Number (Id.

Assigned to the Naval Overseas Transportation Service (NOTS), Morristown sailed from New York City on 27 October 1918 in convoy for Europe, arriving at La Pallice, France, on 15 November 1918 to debark her cargo of United States Army supplies and airplanes.

She made two more runs to European ports with ammunition and general cargo before departing Dartmouth, England, for the United States East Coast on 25 May 1919.