Tainan Airport (Chinese: 台南機場; formally "台南航空站") (IATA: TNN, ICAO: RCNN) is a commercial airport located in South District, Tainan, Taiwan. It is shared with Republic of China Air Force Tainan AFB. In January 2011, the Civil Aeronautics Administration approved the airport to handle international flights.

In 1935 during Japanese rule, Tainan Airport was proposed by the Tainan Prefecture government due to the need for civil transportation in southern Taiwan. The airport was opened on June 26, 1937, with regular flights to Matsuyama Airport (modern-day Taipei Songshan Airport) operated by Japan Air Transport. After World War II broke out, this airport was converted to a base for the Tainan Air Group. During the war this airport was named Eineisho Airport by the United States Armed Forces, to distinguish it from two other, smaller airports located in what is nowadays known as Yongkang and Gueiren District.

After the Republic of China government took over Taiwan, this airport was handed over to the Republic of China Air Force while still maintaining civil flights. Between 1955 and 1979 the United States Air Force was stationed at this airport, once equipped with tactical nuclear weapons on F-4 aircraft from Clark AB with pilots from Clark's 405th Fighter Wing on alert. From 12 March - 1966 to 31 July 1974.

The 12th Fighter-Bomber Squadron Deployed from Kadena Air Base, Okinawa, to Tainan Air Base, from 27 January – 19 February 1955, 3 September – 30 November 1955, equipped with North American F-86 Sabre, 3 March to 2 April 1955, 26th Fighter-Interceptor Squadron was also deployed from Naha Air Base, Okinawa, to Tainan Air Base.

In November 1956, the 336th Fighter-Day Squadron Deployed from Kadena Air Base, Okinawa, to Tainan AB.

On 20 October 1957, the USAF 6200th Air Base Wing (also known as the Tainan Air Base Group) was activated to support the 7th Tactical Missile Squadron (later redesignated the 868th Tactical Missile Squadron which was coming from the CONUS. Lieutenant colonel Carl C. Lee became the first commander of the Tainan Air Base Group. Another redesignation on 18 August 1958 changed the unit's name to the 6214th Air Base Group). On 1958, the A Company of the 802nd Engineer Aviation Battalion, US Army Corps of Engineers was deployed to Tainan Air Force Base for infrastructure work, construction of new base buildings, and laying of new concrete runways. The 868th Tactical Missile Squadron was stationed here from 1958 to 1962, which operated MGM-1 Matadors, probably under the ultimate control of the United States Taiwan Defense Command. On 7 April 1965, the 552d Airborne Early Warning and Control Wing dispatched a Flight from McClellan Air Force Base, California to Tainan Air Base. From 8 February 1966, the 6214th Air Base Group changed the unit's name to the 6214th Combat Support Group.

From 20 November 1965, the 523rd Tactical Fighter Squadron of the 405th Fighter Wing maintained a Detachment at Tainan Air Base (Initially equipped with F-100D Super Sabre, converted to F-4D Phantom II in 1970).

The following are the units that the 405th Fighter Wing once stationed the detachment at Tainan Air Base in Taiwan：