USS Cumberland Sound (AV-17) was a Kenneth Whiting-class seaplane tender in the United States Navy.

Cumberland Sound was underway on 28 October 1944, bound for Pearl Harbor carrying six planes, passengers, and cargo.

She remained on occupation duty, conducting search operations and special flights until 24 November when she headed for the United States.

Following a conversion to make it possible for her to accommodate troops, she departed Seattle, Washington 28 December 1945 and embarked returning servicemen at Pearl Harbor, landing them at San Pedro, California, 12 January 1946.

Assigned to the Operation "Crossroads" nuclear weapon tests, on 19 January, Cumberland Sound entered the Long Beach Naval Shipyard for conversion to a laboratory ship.