Incirlik Air Base is a Turkish air base of slightly more than 3320 ac, located in the İncirlik quarter of the city of Adana, Turkey. The base is within an urban area of 1.7 million people, 10 km (6 mi) east of the city core, and 32 km (20 mi) inland from the Mediterranean Sea. The United States Air Force and the Turkish Air Force are the primary users of the air base, although it is at times also used by the Royal Air Force and the Royal Saudi Air Force. The base is also the home of the 74th Anti-aircraft Artillery Regiment of the Spanish Army.