It is located on the northern coast of the Bohai Sea and is the southernmost county of Huludao City (as well as non-peninsular Liaoning), bordering Hebei to the southwest.

The county has an area of 2,765 square kilometres (1,068 sq mi), a population of 550,000, and is an economically important region within Huludao.

[2] Suizhong is the home of the first Chinese citizen to travel in space, Yang Liwei.

[3] Towns: Townships: Suizhong County has a monsoon-influenced humid continental climate (Köppen Dwa), with cold, very dry, and rather long winters, and hot, humid summers; a majority of the annual rainfall occurs in July and August alone.

Due to the coastal location, temperatures are moderated in the summer, but prevailingly northerly and westerly winds minimise maritime influence during winter.