The Hong Kong Auxiliary Police Force (HKAPF, ) is established in 1914 as the Police Reserve unit, provides additional manpower to the Hong Kong Police Force, especially during emergencies and other incidents. The Hong Kong Auxiliary Police Force was officially established in 1957 with the merger of the 'Special' and 'Reserve' formations which had been in intermittent existence since the 1880s. The part-timers were formally established in 1914 when numerous full-time officers returned to Europe to fight in the World War I. From 1969 to 1997, the Hong Kong Auxiliary Force was known as the Royal Hong Kong Auxiliary Police Force.
Today the Hong Kong Auxiliary Police Force forms a about 4,500 reserves of manpower to assist in times of natural disaster or civil emergency. Officers are involved in reinforcing daily duties and performing crowd control at public events and festivals. The ability to assist during times of emergency is retained. The Commandant reports to the Commissioner of Police.