
Tainan, officially Tainan City, is a city in southern Taiwan. The city proper is a special municipality facing the Formosan Strait or Taiwan Strait in the west and south. Tainan is the oldest city on the island of Taiwan and also commonly known as the "Capital City" for its over 200 years of history as the capital of Taiwan under Koxinga and later Qing rule. Tainan's complex history of comebacks, redefinitions and renewals inspired its popular nickname "the Phoenix City". Tainan is classified as a "Sufficiency" level global city by the Globalization and World Cities Research Network.

At 03:57 local time on 6 February 2016, an earthquake with a moment magnitude of 6.4 struck 28 km (17 mi) northeast of Pingtung City in southern Taiwan, in the Meinong District of Kaohsiung. The earthquake struck at a depth of around 23 km (14 mi). Its comparatively shallow depth caused more intense reverberations on the surface. The earthquake had a maximum intensity of VII on the Mercalli intensity scale, causing widespread damage and 116 deaths. Almost all of the deaths were caused by a collapsed residential building, named Weiguan Jinlong in Yongkang District, except two others, whom were killed in Gueiren District. Sixty-eight aftershocks have occurred. The earthquake was the deadliest earthquake in Taiwan since the 1999 Chi-Chi earthquake.

Thomas Barclay was a missionary of the Presbyterian Church of England to Formosa from 1875 until his death. His ministry in southern Taiwan has been compared to the work done in northern Taiwan by George Leslie Mackay. He founded Tainan Theological College and Seminary in 1876.

Chianan Irrigation, also known as the Kanan Irrigation System, was built support agricultural production in the Chianan Plain of Taiwan. The name "chia-nan" was derived from two place names among its surrounding area called Chiayi and Tainan. Although it includes some other facilities, such as the Wusanto Reservoir, the term "Chianan Canal", in a narrow sense, would only mean the canals of this system.

The Roman Catholic Diocese of Tainan is a diocese of the Latin Rite of the Roman Catholic Church in Taiwan.

The Tahu Culture was an archaeological culture in southern Taiwan. It distributed around the Tainan-Kaohsiung region. The culture was one of the late Neolithic cultures of Taiwan island. A set of several archaeological sites formed the culture, such as the Tahu Site (大湖遺址), Fengpitou Site (鳳鼻頭遺址) and Wushantou Site (烏山頭遺址). These sites had been excavated out many bone tools, potteries or middens.

The Taiwan Sugar Research Institute is a sugar research center of Taiwan Sugar Corporation in East District, Tainan, Taiwan.