18 Squadron

18 Squadron or 18th Squadron may refer to:


 * No. 18 (Netherlands East Indies) Squadron RAAF, a unit of the Australian Royal Air Force
 * No. 18 Squadron RAF, a unit of the United Kingdom Royal Air Force
 * No. 18 Squadron IAF, a unit of the Indian Air Force
 * 18th Flight Test Squadron (United States), a unit of the United States Air Force
 * 18th Fighter Squadron (United States), a unit of the United States Air Force
 * 18th Intelligence Squadron (United States), a unit of the United States Air Force
 * Marine Wing Communications Squadron 18, a unit of the United States Marine Corps
 * Marine Tactical Air Command Squadron 18, a unit of the United States Marine Corps