Chongju (also Jongju) is a si, or city, in southern North Pyongan province, North Korea. Prior to 1994, it was designated as a kun or county. The terrain is mostly level, but mountainous in the north. To the south lies the Chongju Plain, where the hills do not rise above 200 metres. Chongju also includes approximately 10 islands in the Yellow Sea.
Some 40 percent of Chongju is covered by coniferous forestland.
Local agriculture is dominated by orcharding and rice farming; the chestnuts of this region are especially famous. The city is served by both road and rail, with the Pyongui and Pyongbuk lines passing through.
In February 2011, the city and others in North Pyongan had rare protests, of a few score of people, calling for adequate provision of rice and power. At the time, news of the Arab Spring was spreading via Chinese TV channels and phone calls with defectors.