497th

497th may refer to:


 * 497th Air Refueling Wing, inactive United States Air Force unit
 * 497th Bombardment Group, inactive United States Air Force unit
 * 497th Bombardment Squadron, inactive United States Air Force unit
 * 497th Combat Training Squadron, United States Air Force unit
 * 497th Intelligence, Surveillance and Reconnaissance Group (497 ISRG) is an intelligence unit at Joint Base Langley–Eustis, Virginia