USS Inca (ID-3219) was a tugboat acquired by the U.S. Navy during World War I.

She was assigned to the Parris Island, South Carolina, Marine barracks.

The fourth ship to be so named, Inca, an iron tug, was built in 1879 by J. H. Dialogue & Sons, Camden, New Jersey; and acquired by the Navy 31 July 1918.

The tug was assigned to the 6th Naval District, headquartered at Charleston, South Carolina, and operated until after World War I ended at Parris Island Marine Barracks, South Carolina.

She was stricken from the Navy List 1 February 1919.