18 Squadron

18 Squadron or 18th Squadron may refer to:


 * No. 18 (Netherlands East Indies) Squadron RAAF, a unit of the Royal Australian Air Force
 * No. 18 Squadron IAF, a unit of the Indian Air Force
 * No. 18 Squadron RAF, a unit of the United Kingdom Royal Air Force
 * 18th Squadron (Observation), a unit of the United States Army Air Service
 * 18th Aggressor Squadron, a unit of the United States Air Force
 * 18th Combat Mapping Squadron, a unit of the United States Army Air Force
 * 18th Intelligence Squadron, a unit of the United States Air Force
 * 18th Flight Test Squadron, a unit of the United States Air Force
 * 18th Reconnaissance Squadron, a unit of the United States Air Force
 * 18th Space Defense Squadron, a unit of the United States Space Force
 * 18th Squadron (Belgium), a unit of the Belgian 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