USS Pawcatuck (AO-108) was an Ashtabula-class replenishment oiler that served in the U.S. Navy from 1946 to 1973, then transferred to the Military Sealift Command to continue in non-commissioned service with a civilian crew as United States Naval Ship USNS Pawcatuck (T-AO-108). She was the only United States Navy ship to bear the name Pawcatuck.