402nd

402nd or 402d may refer to:


 * 402d Bombardment Squadron, inactive United States Air Force unit
 * 402d Fighter Squadron, inactive United States Air Force unit
 * 402d Fighter-Day Group, inactive United States Air Force unit
 * 402d Maintenance Wing, wing of the United States Air Force based out of Robins Air Force Base, Georgia
 * 402nd Field Artillery Brigade (United States), AC/RC/NG unit based at Fort Bliss, Texas
 * 402nd Support Brigade (United States), support brigade of the United States Army