page_title: Tianjin
section_title: Geography
hierarchical_section_title: Tianjin / Geography
caption_attribution_description: 中文: 美国宇航局的原创作品
context_page_description: Tianjin, alternately romanized as Tientsin, is a municipality and a coastal metropolis in Northern China on the shore of the Bohai Sea. It is one of the nine national central cities in Mainland China, with a total population estimated at 15,621,200 in 2016. Its built-up area, made up of 12 central districts, was home to 12,491,300 inhabitants in 2016 and is also the world's 29th-largest agglomeration and 11th-most populous city proper.
  It is governed as one of the four municipalities under the direct administration of Chinese central government and is thus under direct administration of the State Council. Tianjin borders Hebei Province and Beijing Municipality, bounded to the east by the Bohai Gulf portion of the Yellow Sea. Part of the Bohai Economic Rim, it is the largest coastal city in northern China.
  In terms of urban population, Tianjin is the fourth largest in China, after Shanghai, Beijing, and Guangzhou. In terms of administrative area population, Tianjin ranks fifth in Mainland China. The walled city of Tianjin was built in 1404. As a treaty port since 1860, Tianjin has been a major seaport and gateway to Beijing.
context_section_description: Tianjin is located along the west coast of the Bohai Gulf, looking out to the provinces Shandong and Liaoning across those waters, bordered by Beijing 120 kilometers (75 mi) to the northwest, and is surrounded on all sides by Hebei, with the exception of its eastern border,  the Bohai Sea. With a latitude ranging from 38° 34' to 40° 15' N, and longitude ranging from 116° 43' to 118° 04' E, the total area is 11,860.63 square kilometers (4,579.41 sq mi). There is 153 km (95 mi) of coastline and 1,137.48 kilometers (706.80 mi) of land border. It lies at the northern end of the Grand Canal of China, which connects with the Yellow River and Yangtze River. The municipality is generally flat, and swampy near the coast, but hilly in the far north, where the Yan Mountains intrude into northern Tianjin. The highest point in the municipality is Jiuding Peak (九顶山) in Ji County on the northern border with Hebei, at an altitude of 1,078.5 m (3,538 ft).
  The Hai River forms within Tianjin Municipality at the confluence of the Ziya River (子牙河), Daqing River (大清河), Yongding River, North Grand Canal, and South Grand Canal, and enters the Pacific Ocean within the municipality, as well in Tanggu District. Major reservoirs include the Beidagang Reservoir in the extreme south (in Dagang District) and the Yuqiao Reservoir in the extreme north in Ji County.
caption: 2011 satellite image of Tianjin. The city center was on the left, while the smaller urban area to the right was the Binhai New Area.
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