It is located in the northwest of Jiaodong Peninsula and the south bank of Bohai Bay, adjacent to Penglai District in the east, Qixia City and Zhaoyuan City in the south, Bohai Sea in the west and north, and facing Tianjin and Dalian across the sea.

With a total area of 901 square kilometers, the city has jurisdiction over 5 subdistricts, 8 towns and 1 high-tech industrial park.

[1] Huang County was the center of the ancient Dongyi state of Lai during China's Zhou dynasty.

At the west coast of Longkou, there is one of China's largest land reclamation projects under development.

There is also a number of smaller industrial companies, such as Longkou Beer Equipment Co.[10] In 2021, the regional GDP and general public budget revenue of Longkou City reached 123.66 billion yuan and 11.2 billion yuan respectively, with an annual growth rate of 6.7% and 5% respectively.