USS Long (DD-209/DMS-12), named for John Davis Long (1838–1915), Secretary of the Navy from 1897 to 1902, was a Clemson-class destroyer in the United States Navy. Long was laid down by the William Cramp and Sons at Philadelphia on 23 September 1918, launched on 26 April 1919 by Mrs. Arnold Knapp and commissioned on 20 October 1919, Commander A. B. Cook in command.