The chief minister of the Australian Capital Territory is the head of government of the Australian Capital Territory. The leader of the party with the largest number of seats in the unicameral Australian Capital Territory Legislative Assembly usually takes on the role. Unlike other states and territories, the chief minister is not appointed by a governor or administrator, but elected directly by the Assembly.

The Government of the Australian Capital Territory, also referred to as the Australian Capital Territory Government or ACT Government, is the executive branch of the Australian Capital Territory, one of the territories of Australia. The leader of the party or coalition with the confidence of the Australian Capital Territory Legislative Assembly forms government. Unlike the Australian States and the Northern Territory, the Australian Capital Territory Legislative Assembly directly elects one of their number to be the Chief Minister of the Australian Capital Territory as the head of the Government, rather than being appointed by a Governor or Administrator.