Yingkou is a coastal prefecture-level city of central southern Liaoning province, People's Republic of China, on the northeastern shore of Liaodong Bay. It is the third-smallest city in Liaoning with a total area of 5,502 square kilometres, and the ninth most populous with a population of 2,328,582 as of the 2020 census, of whom 1,228,198 lived in the built-up area made of three urban districts and one county-level city.