USS Uncas has been the name of more than one United States Navy ship, and may refer to:
- USS Uncas (1843), a steamer in commission from 1862 to 1863
- USS Uncas (1893), later redesignated Ocean Tug No. 51, AT-51, and YT-110, an armed tug in commission from 1898 to 1922
- USS Uncas (SP-689), later renamed USS SP-689, a patrol boat in commission from 1917 to 1918
- USS Uncas (YT-242), a tug in commission from 1942 to 1946
This article includes a list of ships with the same or similar names. If an internal link for a specific ship led you here, you may wish to change the link to point directly to the intended ship article, if one exists.