Cāngzhōu (simplified Chinese: 沧州; traditional Chinese: 滄州) is a prefecture-level city in Hebei province, People's Republic of China. Cangzhou's urban center has a population of approximately 514,074 as of the 2010 national census (corresponding to the built up area of the prefecture-level city), while the prefecture-level administrative unit in total has a population of 7,134,053. It lies approximately 180 km from Beijing, China's capital, and 90 km from the major port city of Tianjin.