The Minister of Militia and Defence was the federal government minister in charge of the volunteer army units in Canada, the Canadian Militia, before the creation of the Canadian Army.
From 1855 to 1906, the minister was responsible for Canadian militia units only, as the British Army was still stationed in Canada. From 1906 to 1923, the minister was in charge of the Department of Militia and Defence (Canada). After 1923, the position was merged with the Minister of the Naval Service and the Minister of Aviation into the new position of Minister of National Defence. The Minister of National Defence became responsible for the Canadian Militia, the Royal Canadian Navy and, from 1924, the Royal Canadian Air Force.