498th

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 in 25 October 2011