- Source: USS Duffy
The following ships of the United States Navy can be referred to as USS Duffy;
USS Duffy (DE-27), an Evarts-class destroyer escort launched and commissioned in 1943. The ship served in the Pacific Theater during World War II until 1945 and was sold for scrap in 1947.
USS Duffy (DE-268), an Evarts-class destroyer escort transferred to the United Kingdom under Lend-Lease and renamed HMS Dacres as a Captain-class frigate. The ship served with the Royal Navy during World War II, but was returned to the US following its end and was scrapped in 1946.