498th may refer to:
498th Bombardment Squadron, inactive United States Air Force unit 498th Fighter-Interceptor Squadron, inactive United States Air Force unit 498th Nuclear Systems Wing (498 NSW), wing of the United States Air Force based at Kirtland Air Force Base, New Mexico 498th paratroopers battalion, Romanian Land Forces brigade formed on 25 October 2011
See also 498 (number) 498, the year 498 (CDXCVIII) of the Julian calendar 498 BC