The Marine Region is a branch of the Hong Kong Police Force, more widely known as the Marine Police. The marine police patrols 1,651 km2 (637 sq mi) of waters within the territory of Hong Kong, including 263 islands. The Marine Region is made up of about 3,000 officers. It has a fleet of 142 boats in total, the largest of any civil police force in the world.

The Hong Kong Police Force (HKPF) is the primary law enforcement, investigative agency, and largest disciplined service under the Security Bureau of Hong Kong.