Leeds—Grenville—Thousand Islands—Rideau Lakes is a federal electoral district in Ontario, Canada, that has been represented in the House of Commons since 1979. Prior to the 2025 election, the riding was known as Leeds—Grenville—Thousand Islands and Rideau Lakes, and prior to the 2015 election as Leeds—Grenville.
The 2018 Leeds—Grenville—Thousand Islands and Rideau Lakes federal by-election was won by Michael Barrett. Michael has represented this riding since December 3, 2018.
Geography The riding consists of the entirety of the United Counties of Leeds and Grenville.
Demographics According to the 2021 Canadian census
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)
History
The federal district was created in 1976 as Leeds—Grenville from parts of Grenville–Carleton and Leeds ridings.
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, 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.
Following the 2022 Canadian federal electoral redistribution, this riding was renamed Leeds—Grenville—Thousand Islands—Rideau Lakes prior to the 2025 Canadian federal election.
Members of Parliament
This riding has elected the following members of Parliament:
Election results
2011 federal election redistributed results Party Vote % Conservative 29,989 60.80 New Democratic 9,032 18.31 Liberal 7,839 15.89 Green 2,460 4.99
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
See also List of Canadian electoral districts Historical federal electoral districts of Canada
References
Notes
External links Federal riding history from the Library of Parliament 2011 Results from Elections Canada Leeds—Grenville profile at CBC News