USS Ibex (IX-119), an Armadillo-class tanker designated an unclassified miscellaneous vessel, was the second ship of the United States Navy to be named for the ibex, a variety of wild goat found in Europe, Asia, and Africa. Her keel was laid down as Nicholas Longworth under a Maritime Commission contract (T. EC2-S-C1) by the California Shipbuilding Corporation in Wilmington, California, on 16 October 1943. She was renamed Ibex on 27 October, launched on 15 November sponsored by Mrs. A. T. Olson, acquired by the Navy 13 December 1943; and commissioned the same day with Lieutenant Commander John L. Frazer in command.