Major General Herbert Bernard Loper (22 October 1896 – 25 August 1989) was a United States Army officer who helped plan the Mariana and Palau Islands campaign and the Okinawa campaign during World War II. He was chief of the Armed Forces Special Weapons Project from 1952 to 1953, and Chairman of the Military Liaison Committee of the United States Atomic Energy Commission from 1954 to 1961.