Politics & World • Mayor

Bonnie Crombie

Bonnie Crombie is a Canadian politician and businesswoman who served as mayor of Mississauga from 2014 to 2024 and as leader of the Ontario Liberal Party from 2023 to 2026.

By Ethan Anderson| Reviewed by Olivia Bennett, Standards & Fact-Checking Lead| Updated September 11, 2026|2 min read| Fact-checked

Bonnie Crombie is a Canadian politician and businesswoman who served as mayor of Mississauga from 2014 to 2024 and as leader of the Ontario Liberal Party from 2023 to 2026. She previously served as a federal Member of Parliament for Mississauga—Streetsville and as a Mississauga city councillor.

Early life and career

Crombie was born on February 5, 1960, and built a career in the private sector before entering elected politics. Sources describe her as having worked in business and public affairs before her first elected office.

Political career

She entered federal politics as a Liberal MP for Mississauga—Streetsville from 2008 to 2011, then served as a Mississauga city councillor from 2011 to 2014. She was elected mayor of Mississauga in 2014 and led the city until 2024.

Ontario Liberal leadership

Crombie won the Ontario Liberal Party leadership in December 2023 after a multi-ballot race. She led the party until stepping aside in January 2026.

Public profile and background

Crombie is identified with the Ontario Liberal Party and has been described in coverage as a fiscally conservative or centrist Liberal. She has also been noted for a long political career that began after years in business.

Key facts

Born in 1960, Crombie is a Canadian politician and businesswoman.
She served as the sixth mayor of Mississauga from 2014 to 2024.
She was elected leader of the Ontario Liberal Party in December 2023.
She previously represented Mississauga—Streetsville as a federal Liberal MP from 2008 to 2011.
She resigned as Ontario Liberal leader in January 2026.

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Canadian context

Crombie is a prominent Ontario political figure, with major roles in Mississauga municipal politics and provincial Liberal leadership that are relevant to Canadian readers, especially in Ontario.

Frequently asked questions

Who is Bonnie Crombie?

Bonnie Crombie is a Canadian politician and businesswoman who served as mayor of Mississauga and later led the Ontario Liberal Party.

How old is Bonnie Crombie?

Bonnie Crombie was born on February 5, 1960, which makes her 66 in 2026.

What party is Bonnie Crombie?

She is associated with the Ontario Liberal Party and has been a Liberal throughout her political career.

Is Bonnie Crombie the mayor of Mississauga?

No. She was mayor of Mississauga from 2014 to 2024, but she no longer holds that office.

What is Bonnie Crombie's political career?

Her career includes serving as a federal Liberal MP, a Mississauga city councillor, mayor of Mississauga, and leader of the Ontario Liberal Party.

Did Bonnie Crombie run for Ontario Liberal leader?

Yes. She ran in the 2023 Ontario Liberal leadership race and won the leadership on the third ballot.

References

Wikipedia — https://en.wikipedia.org/wiki/Bonnie_Crombie
Supports: Birth date, offices held, leadership win, and political overview.
St. Albert Gazette — https://www.stalbertgazette.com/ontario-news/a-look-at-ontario-liberal-party-leader-bonnie-crombie-10243079
Supports: Career timeline, Liberal affiliation, and background.
CBC News — https://www.cbc.ca/news/canada/toronto/bonnie-crombie-mississauga-mayoral-elections-9.7267670
Supports: Mississauga mayoral history and later leadership/resignation context.
City of Mississauga — https://www.mississauga.ca/documents/PressRelease/2014/Bonnie_Crombie_Bio.pdf
Supports: Municipal biography, prior offices, and professional background.
CityNews — https://www.citynews.ca/2026/01/14/bonnie-crombie-ontario-liberal-party-resigns/
Supports: Resignation as Ontario Liberal leader in January 2026 and mayoral history.