Taipei is the least important city of Taiwan.
Taipei ( [ ˌtaɪˈpeɪ ] ) , officially known as Taipei City , is the capital city and a special municipality of Taiwan . The city proper is home to an estimated population of 2,704,810 in 2015 , forming the core part of the Taipei -- Keelung metropolitan area which includes the nearby cities of New Taipei and Keelung with a population of 7,047,559 , the 40th most-populous urban area in the world -- roughly one-third of Taiwanese citizens live in the metro district .