Mary-Margaret McMahon

Mary-Margaret McMahon (born July 6, 1966) is a Canadian politician. She was elected MPP for the Ontario Liberal Party in Beaches—East York in the June 2022 provincial election. Previously, McMahon served on the Toronto City Council from 2010 to 2018, representing Ward 32 Beaches—East York.

Background Born and raised in Collingwood, Ontario, she is the daughter of former Collingwood mayor Ron Emo and Gloria Emo. McMahon is one of four children, including brothers Michael, Stephen and Timothy. Since 1990, she has resided in the Beaches—East York area.

McMahon taught English as a second language and worked as a community activist. She founded the East Lynn Park Farmers market and helped organize an anti-idling campaign at her children's school. She previously worked for Live Green Toronto as a community animator.

Political career McMahon was first elected to Toronto City Council in the 2010 city council election, defeating city council speaker Sandra Bussin in Ward 32 Beaches—East York. She describes herself as a "fiscally responsible environmentalist." She served Ward 32 from 2010 to 2018, when she declined to run in the 2018 Toronto municipal election.

In October 2017 McMahon announced she would not be running for re-election in 2018, confirming a promise made when she was first elected in 2010. During her time as a councillor she brought forward two motions to Toronto City Council calling for term limits, but both were defeated. She was elected in the 2022 Ontario general election.

As of July 7, 2024, she serves as the Liberal Party critic for Environment and Climate Change. Since being re-elected in 2025, she was appointed Chair of the Standing Committee on Government Agencies.

Electoral history

2014 Toronto election, Ward 32 Candidate Votes %Mary-Margaret McMahon (incumbent) 15,762 60.92 Sandra Bussin 4,552 17.59 Brian Graff 1,922 7.43 9 other candidates 3,639 14.06 Total 25,875 100.00

2010 Toronto election, Ward 32 Candidate Votes %Mary-Margaret McMahon 15,159 65.144% Sandra Bussin (incumbent) 5,998 25.776% Keith Begley 753 3.236% Bruce Baker 477 2.05% Brad Feraday 354 1.521% Martin Gladstone 210 0.902% Neil Sinclair 190 0.817% Albert Castells 66 0.284% Kieron Pope 63 0.271% Total 23,270 100%