ACT Policing is the portfolio of the Australian Federal Police (AFP) responsible for providing policing services to the Australian Capital Territory (ACT). The Australian Capital Territory Police was an independent police force responsible for policing the ACT until 19 October 1979, when it was merged with the Commonwealth Police to form the AFP.

In 1911, the ACT was proclaimed as the seat of Australian government, then the Federal Capital Territory under Commonwealth Government administration. Until 1927, the New South Wales Police patrolled what was mostly rural bushland, except for a small and slowly expanding capital city of Canberra. By the mid-1920s plans were well underway to move Parliament and several Commonwealth Government departments to Canberra and many public buildings were on the verge of being constructed.

In 1926, the Commonwealth Attorney-General determined that policing in the Territory should be performed by a local force. In 1927, the Federal Capital Territory Police was formed and staffed by 11 men, 10 former Commonwealth Peace Officers and the former NSW Police Sergeant, who had been in charge of the NSW Police contingent in Canberra. The force soon changed its name to the Commonwealth Police (Australian Capital Territory), until 1957 when it formally adopted the name, Australian Capital Territory Police Force.