|Member of Parliament for Westmorland|
|Preceded by||Sherwood Rideout|
|Succeeded by||riding dissolved|
|Born||Margaret Isabel Saunders
June 16, 1923
Bridgewater, Nova Scotia
|Died||May 12, 2010 (aged 86)|
Margaret Isabel Rideout (née Saunders) (June 16, 1923 – May 12, 2010) was a Canadian politician, who represented the electoral district of Westmorland in the Canadian House of Commons from 1964 to 1968. She was the first woman elected to the House of Commons from New Brunswick.
A Liberal, Rideout first won the riding in a 1964 by-election following the death of Sherwood Rideout, her husband and the district's incumbent Member of Parliament. She was re-elected in 1965, and was named parliamentary secretary to the Minister of Health and Welfare in 1966. She served in that role until the 1968 election, when she was defeated by Charlie Thomas in the redistricted riding of Moncton. She was subsequently named a citizenship judge.
- Gordon DeWar (14 Nov 1964). "The Week On The Hill". The Ottawa Journal. p. 9. Retrieved 19 July 2015 – via Newspapers.com.