Leeds—Grenville—Thousand Islands and Rideau Lakes (French: Leeds—Grenville—Thousand Islands et Rideau Lakes) is a federal electoral district in Ontario, Canada, that has been represented in the House of Commons since 1979. Prior to the 2015 election, the riding was known as Leeds—Grenville.^[2]

Quick Facts Ontario electoral district, Federal electoral district ...

Leeds—Grenville—Thousand Islands and Rideau Lakes

Ontario electoral district
Leeds–Grenville shown within the Eastern Ontario region
Federal electoral district
Legislature	House of Commons
MP	Michael Barrett Conservative
District created	1976
First contested	1979
Last contested	2021
District webpage	profile, map
Demographics
Population (2016)[1]	100,546
Electors (2015)	78,225
Area (km²)[1]	3,382.89
Pop. density (per km²)	29.7
Census division(s)	Leeds and Grenville
Census subdivision(s)	Athens, Augusta, Brockville, Edwardsburgh/Cardinal, Elizabethtown–Kitley, Front of Yonge, Gananoque, Leeds and the Thousand Islands, Merrickville–Wolford, North Grenville, Prescott, Rideau Lakes, Westport

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The 2018 Leeds—Grenville—Thousand Islands and Rideau Lakes federal by-election was won by Michael Barrett.

The riding consists of the entirety of the United Counties of Leeds and Grenville.

According to the 2021 Canadian census^[3]

Ethnic groups: 91.3% White, 5.6% Indigenous
Languages: 91.7% English, 3.2% French
Religions: 60.6% Christian (22.2% Catholic, 11.5% United Church, 9.9% Anglican, 2.3% Presbyterian, 1.3% Methodist, 1.3% Pentecostal, 12.1% other), 37.7% none
Median income: $41,600 (2020)
Average income: $51,040 (2020)

The federal district was created in 1976 from parts of Grenville–Carleton and Leeds ridings.^[4]

It was initially defined as consisting of the County of Grenville and the County of Leeds, excluding the Town of Smiths Falls. Since 1987, it was re-defined as consisting of the United Counties of Leeds and Grenville, but this did not result in any boundary changes, as Smiths Falls is not part of the county. The 2003 redistribution defined the riding as also including the independent municipalities of Brockville, Gananoque and Prescott which are politically separate jurisdictions, but are geographically within the county, and therefore did not result in a boundary change either.

With the 2012 electoral redistribution, this district lost a small portion of territory to Lanark—Frontenac—Kingston,^[5] following an annexation of a parcel of land by the Town Smiths Falls. In the process, the riding was renamed Leeds—Grenville—Thousand Islands and Rideau Lakes. At 49 characters, this is the longest riding name in Canada.

Following the 2022 Canadian federal electoral redistribution, this riding will be renamed Leeds—Grenville—Thousand Islands—Rideau Lakes at the first election held after approximately April 2024.^[6]

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 Leeds—Greenville—Thousand Islands and Rideau Lakes (minor parties that never got 2% of the vote or didn't run consistently 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.

^ Change is from 1980

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