Lianyungang in Jiangsu Province was called "Haizhou" in ancient times.

Lianyungang City is located in the Yangtze River Delta region on the eastern coast of China, in the northeastern part of Jiangsu Province, at the junction of the hills in central and southern Shandong and the Huaibei Plain. It borders the Yellow Sea in the east and faces North Korea, South Korea, and Japan across the sea; it borders Xuzhou and Suqian in the west; it borders Huai'an and Yancheng in the south; and it borders Linyi and Rizhao in the north.