329th may refer to:
329th Armament Systems Group, inactive United States Air Force unit, inactivated in 2007 329th Combat Crew Training Squadron, inactive United States Air Force unit 329th Fighter-Interceptor Squadron, inactive United States Air Force unit 329th Infantry Regiment (United States), unit of the United States Army during World War II
See also 329 (number) 329, the year 329 (CCCXXIX) of the Julian calendar 329 BC