Cangzhou (simplified Chinese: 沧州; traditional Chinese: 滄州; pinyin: Cāngzhōu) is a prefecture-level city in eastern Hebei province, People's Republic of China. At the 2010 census, Cangzhou's built-up (or metro) area made of Yunhe, Xinhua districts and Cang County largely being conurbated had a population of 1,205,814 inhabitants, while the prefecture-level administrative unit in total has a population of 7,134,062. It lies approximately 90 kilometres (56 mi) from the major port city of Tianjin, and 180 km (110 mi) from Beijing.
Cangzhou is reported to have been founded in the Southern and Northern Dynasties period (420−589 CE).
Cangzhou is located in eastern Hebei, immediately to the south of Tianjin, near the coast of the Bohai Sea of the Pacific Ocean. Bordering prefecture-level cities are Hengshui to the southwest, Baoding to the west, and Langfang to the north. It lies on the Beijing–Shanghai Railway.
The G1811 Huanghua–Shijiazhuang Expressway connects Cangzhou to Shijiazhuang, the provincial capital, and is linked to Beijing via both the G2 Beijing–Shanghai Expressway and G3 Beijing–Taipei Expressway, which are concurrent within the province, and to Shanghai via G2. Cangzhou's Huanghua Harbour is the end of a main Chinese coal shipping railway, the Shuohuang Railway. Other major highways serving Cangzhou's urban area are China National Highway 104 and 307.
Major airports located closest to Cangzhou include Beijing Capital Airport and Tianjin Airport.
The Grand Canal passes directly through Cangzhou, and a district of Cangzhou (Yunhe District) is named after it.
Cangzhou has a four-season, monsoon-influenced climate lying right on the border between the humid continental and humid subtropical regimes (Köppen Dwa/Cwa), with cold, dry winters, and hot, humid summers. The monthly 24-hour average temperature ranges from −3.0 °C (26.6 °F) to 26.5 °C (79.7 °F), while the annual mean is 12.90 °C (55.2 °F). Close to 60% of the annual rainfall of 605 mm (23.8 in) occurs in July and August alone. With possible monthly percent possible sunshine ranging from 49% in July to 65% in October, the city receives 2,663 hours of bright sunshine annually.