Canada has had 21 Prime Ministers since Confederation in 1867.

Canada's longest-serving Prime Minister was William Lyon Mackenzie King, who served a total of 21 years, five months and one day in three stints beginning in December 1921 and ending with his retirement in 1948.

The person with the shortest term as Prime Minister was Sir Charles Tupper, who was Prime Minister for just two months and seven days.

Canada's current Prime Minister is Stephen Harper. He was sworn in as PM on February 6, 2006.

The following is a complete list of Canada's Prime Ministers:

Prime Minister	Party	Term(s)
Stephen Harper	Conservative	Feb. 6, 2006 -
Paul Martin	Liberal	Dec. 12, 2003 - Feb. 6, 2006
Jean Chretien	Liberal	Nov. 4, 1993-Dec. 12, 2003
Kim Campbell	Prog. Cons.	June 25, 1993-Nov. 4, 1993
Brian Mulroney	Prog. Cons.	Sept. 17, 1984-June 25, 1993
John Turner	Liberal	June 30, 1984-Sept. 17, 1984
Joe Clark	Prog. Cons.	June 4, 1979-Mar. 3, 1980
Pierre Trudeau	Liberal	Mar. 3, 1980-June 30, 1984 Apr. 20, 1968-June 4, 1979
Lester Pearson	Liberal	Apr. 22, 1963-Apr. 20, 1968
John Diefenbaker	Prog. Cons.	June 21, 1957-Apr. 22, 1963
Louis St. Laurent	Liberal	Nov. 15, 1948-June 21, 1957
R. B. Bennett	Conservative	Aug. 7, 1930-Oct. 23, 1935
Mackenzie King	Liberal	Oct. 23, 1935-Nov. 15, 1948 Sept. 25, 1926-Aug. 6, 1930 Dec. 29, 1921-June 28, 1926
Arthur Meighen	Conservative	June 29, 1926-Sept. 25, 1926
	Unionist	July 10, 1920-Dec. 29, 1921
Sir Robert Borden	Conservative	Oct. 12, 1917-July 10, 1920
	Unionist	Oct. 10, 1911-Oct. 12, 1917
Sir Wilfrid Laurier	Liberal	July 11, 1896-Oct. 6, 1911
Sir Charles Tupper	Conservative	Apr. 27, 1896-July 8, 1896
Sir Mackenzie Bowell	Conservative	Dec. 13, 1894-Apr. 27, 1896
Sir John Thompson	Conservative	Nov. 25, 1892-Dec. 12, 1894
Sir John Abbott	Conservative	June 15, 1891-Nov. 24, 1892
Alexander Mackenzie	Liberal	Nov. 5, 1873-Oct. 9, 1878
Sir John A. Macdonald	Conservative	Oct. 9, 1878-June 6, 1891 July 1, 1867-Nov. 5, 1873