Youngest
The youngest ever MP is currently Pierre-Luc Dusseault, elected in the general election of 2011 at the age of 19 years and 11 months for the riding of Sherbrooke. He succeeded former Liberal Party MP, Claude-André Lachance, who was elected in the federal election of 1974. Lachance was 20 years and 3 months old when elected.
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The youngest ever woman MP used to be Carole Jacques when she was elected at the general election of September 4, 1984 at the age of 24 years and 2 months. During the 2011 Canadian Federal Election, Laurin Liu of the riding Rivière-des-Mille-Îles, was elected at the age of 20 years. In the same election, many women under the age of 24 were elected including Charmaine Borg, in the riding of Terrebonne—Blainville who is a mere 10 days older than Liu. Others under 24 include Ève Péclet, 21, Mylène Freeman, 22, and others.
Oldest
The oldest MP was William Anderson Black who retained his seat until his death at the age of 86 years, 10 months and 22 days.
Longest
Wilfrid Laurier was an MP for 44 years and 11 months between January 22, 1874 and February 17, 1919, although his tenure was not continuous. He did serve continuously for 41 years and 2 months from November 28, 1877 to February 17, 1919, making him also the MP with the longest continuous service.
No period of service
John Dahmer died five days after being elected, before he could be officially sworn in as an MP.