USS Adamant (AMc-62) was an Accentor-class minesweeper in the United States Navy during World War II. Adamant was laid down on 31 March 1941 at Greenport, Long Island, New York, by the Greenport Basin and Construction Company as USS Advance; renamed Adamant on 17 May 1941; launched on 7 June 1941; sponsored by Mrs. Kelly Hunter, a niece of Secretary of the Treasury Henry Morgenthau, Jr.; and placed in service on 26 September 1941 at the New York Navy Yard, Lt. (jg.) R. A. L. Ellis, USNR, in charge.