Yingkou or Yingkow (both: yĭng-kō) [key], city (1994 est. pop. 465,700), S Liaoning prov., China, on the Liao River near its mouth on the Bohai. It is on the South Manchurian RR in an area producing rice, cotton, and oakleaf silk. It has fishing, lumbering, food processing, and oil refining industries and plants making textiles, machinery, and paper products. From 1836 to 1900, Yingkou was the chief port of Manchuria.