Physical map of Tianjin
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 kilometres to the northwest, and except for the east, is surrounded on all sides by Hebei. 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 kilometres. There is 153 km of coastline and 1,137.48 kilometres 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 in Ji County on the northern border with Hebei, at an altitude of 1,078.5 m.
The Hai River forms within Tianjin Municipality at the confluence of the Ziya River, Daqing River, 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.