Lambton—Kent—Middlesex (formerly known as Middlesex—Kent—Lambton) is a federal electoral district in Ontario, Canada, that has been represented in the House of Commons of Canada since 1997.

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Lambton—Kent—Middlesex

Ontario electoral district
Lambton—Kent—Middlesex in relation to other southern Ontario electoral districts
Federal electoral district
Legislature	House of Commons
MP	Lianne Rood Conservative
District created	1996
District abolished	2023
First contested	1997
Last contested	2021
District webpage	profile, map
Demographics
Population (2016)[1]	105,331
Electors (2015)	80,027
Area (km²)[2]	5,278
Pop. density (per km²)	20
Census division(s)	Chatham-Kent, Lambton, Middlesex
Census subdivision(s)	Chatham-Kent, Strathroy-Caradoc, Middlesex Centre, Lambton Shores, North Middlesex, Southwest Middlesex, Lucan Biddulph, Warwick, Adelaide Metcalfe, Brooke-Alvinston

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The district includes all of Middlesex County except the City of London and Thames Centre Township, all of the Municipality of Chatham-Kent north of the Thames River, and excluding the former City of Chatham, and the Municipalities of Lambton Shores, Brooke-Alvinston Township, Dawn Euphemia Township, Warwick Township and the Indian reserves of Kettle Point and Walpole Island in the County of Lambton. The population in 2001 was 105,291, and the area is 5,277 km².

It was created in 1996 from Kent and Lambton—Middlesex. It was renamed "Middlesex—Kent—Lambton" briefly in 2003 to 2004. The retirement of longtime MP Rose-Marie Ur in 2006 allowed Bev Shipley, her Conservative opponent in 2004, to seize the riding. The Tories have held the riding without serious difficulty ever since, including in 2015 during the Liberal surge that swept through Ontario.

This riding lost a fraction of territory to Chatham-Kent—Leamington and gained a fraction from Chatham-Kent—Essex during the 2012 electoral redistribution.

According to the 2021 Canadian census^[3]

Ethnic groups: 91.8% White, 4.9% Indigenous

Languages: 90.5% English, 1.5% Dutch, 1.2% Portuguese, 1.0% French, 1.0% German

Religions: 63.6% Christian (25.1% Catholic, 10.8% United Church, 5.3% Anglican, 3.2% Presbyterian, 2.6% Baptist, 1.4% Reformed, 1.2% Pentecostal, 14.0% Other), 35.0% None

Median income: $42,400 (2020)

Average income: $52,400 (2020)

This riding has elected the following members of Parliament:

Graphs are unavailable due to technical issues. There is more info on Phabricator and on MediaWiki.org.

Graph of election results in Lambton—Kent—Middlesex (minor parties that never got 2% of the vote are omitted)

Note: Conservative vote is compared to the total of the Canadian Alliance vote and Progressive Conservative vote in 2000 election.

Note: Canadian Alliance vote is compared to the Reform vote in 1997 election.

• List of Canadian federal electoral districts
• Historical federal electoral districts of Canada