383rd or 383d may refer to:
383d Bombardment Group, inactive United States Air Force unit 383d Bombardment Squadron or 133d Air Refueling Squadron, unit of the New Hampshire Air National Guard 157th Air Refueling Wing 383d Fighter Squadron, inactive United States Air Force unit 383rd Rifle Division (Soviet Union), a formation of the Red Army created during the Second World War
See also 383 (disambiguation)