The Twelfth Canadian Ministry was the first cabinet chaired by Prime Minister William Lyon Mackenzie King. It governed Canada from 29 December 1921 to 28 June 1926, including the 14th Canadian Parliament and most of the 15th. The government was formed by the Liberal Party of Canada. Mackenzie King was also Prime Minister in the Fourteenth and Sixteenth Canadian Ministries.

Ministers

Prime Minister

29 December 1921 – 29 June 1926: William Lyon Mackenzie King

Minister of Agriculture

29 December 1921 – 29 June 1926: William Richard Motherwell

Minister of Customs and Excise

29 December 1921 – 5 September 1925: Jacques Bureau

5 September 1925 – 29 June 1926: Georges Henri Boivin

Secretary of State for External Affairs

29 December 1921 – 29 June 1926: William Lyon Mackenzie King

Minister of Finance

29 December 1921 – 5 September 1925: William Stevens Fielding

5 September 1925 – 29 June 1926: James Robb

Receiver General of Canada

12th Canadian Ministry