The Harvey C. Barnum, Jr. (DDG 124) is the 74th Arleigh Burke-class guided-missile destroyer and the first ship in the United States Navy named in honor of retired Marine Corps Col. Harvey C. Barnum, Jr., who received the Medal of Honor for heroism displayed during an action outside Ky Phu, Quang Tin Province, Vietnam, in December 1965.

May 21, 2021 The keel authentication ceremony for the future USS Harvey C. Barnum, Jr., was held at the Bath Iron Works shipyard.

July 29, 2023 The Pre-Commissioning Unit (PCU) Harvey C. Barnum, Jr., was christened during a 10.30 a.m. EDT ceremony at Bath Iron Works in Bath, Maine. Ms. Martha Hill, the wife of the ship's namesake, served as the sponsor.