USS Westpool (ID-3675) – sometimes written as West Pool – was a cargo ship of the United States Navy that served during World War I and its immediate aftermath.

As SS Westpool, she was sunk in less than a minute during World War II following an attack by U-73 after being sold to the United Kingdom for use as a merchant ship.

She then loaded 5,002 tons of United States Army cargo and departed New York on 1 February 1919, bound for Antwerp, Belgium.

Early in World War II, the British government purchased Westpool to help to alleviate the shipping shortage the United Kingdom faced due to losses to German submarines.

After a brief career in British service, Westpool was on a voyage from Halifax, Nova Scotia, Canada, to Liverpool, England, carrying 7,144 tons of scrap iron as a part of Convoy SC 26 when she was sunk on 3 April 1941 by the German submarine U-73 with the loss of 35 members of her crew.