New Taipei City (Chinese: 新北市; pinyin: Xīnběi Shì; Pe̍h-ōe-jī: Sin-pak-chhī) is the most populous city of Taiwan. The area includes a substantial stretch of Taiwan's northern coastline and surrounds the Taipei Basin. New Taipei surrounds Taiwan's capital city Taipei, and is bordered by Keelung to the northeast, Yilan County to the southeast, and Taoyuan County to the southwest.

New Taipei had been administered as Taipei County (Chinese: 臺北縣 or 台北縣 Táiběixiàn) of Taiwan until its reorganization as a special municipality on December 25, 2010.

Initially the official English version of the city's name was assigned to be Xinbei City by the county authority, which is the pinyin transliteration of the Chinese city name. The new mayor Eric Chu requested the name New Taipei City as the official English rendering instead.New Taipei is named from "新臺北", where New is the literal translation of "新" and Taipei is the transcription of "臺北". Considering the mayor's request and the public opinion, the Ministry of the Interior (MOI) approved the name New Taipei City on December 31, 2010.

Taipei City (/ˌtaɪˈpeɪ/; [tʰǎipèi]; Chinese: 臺北市 or 台北市; pinyin: Táiběi Shì) is the capital of the Republic of China (Taiwan). Situated at the northern tip of the island of Taiwan, Taipei is located on the Tamsui River; it is about 25 km southwest of Keelung, a port city on the Pacific Ocean. It lies in the two relatively narrow valleys of the Keelung (基隆河) and Xindian (新店溪) rivers, which join to form the Tamsui River along the city's western border. The city proper (Taipei City) is home to an estimated 2,618,772 people. Taipei, New Taipei, and Keelung together form the Taipei metropolitan area with a population of 6,900,273. However, they are administered under different local governing bodies. "Taipei" sometimes refers to the whole metropolitan area, while "Taipei City" refers to the city proper. Taipei City proper is surrounded on all sides by New Taipei.

Taipei is the political, economic, and cultural center of Taiwan. The National Palace Museum which has one of the largest collections of Chinese artifacts and artworks in the world is located in Taipei. Considered to be a global city, Taipei is part of a major industrial area. Railways, high speed rail, highways, airports, and bus lines connect Taipei with all parts of the island. The city is served by two airports – Taipei Songshan and Taiwan Taoyuan.