Bryan McAllister’s personal reference notebook
September 12, 2026Short & citedBlog
Civic Viewpoint.
A quiet encyclopedia with a personal desk
Kept by Bryan McAllister — short guides, clear facts, and the Canadian angle when it matters.
Civic Brief • 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.

Updated September 12, 20261 min readCited sources

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 represented Mississauga—Streetsville as a federal Liberal MP.

Political Career Highlights

Crombie 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, succeeding Hazel McCallion, and led the city until 2024. Her tenure as mayor focused on urban development and fiscal management.

Ontario Liberal Leadership

Crombie won the Ontario Liberal Party leadership in December 2023 after a multi-ballot race, succeeding Steven Del Duca. She led the party until stepping aside in January 2026. During her leadership, she was positioned as a centrist Liberal with a focus on rebuilding the party’s provincial presence.

Background and Profile

Born on February 5, 1960, Crombie built a career in business and public affairs before entering elected office. She is identified with the Ontario Liberal Party and has been described as fiscally conservative or centrist. Her full name is Bonnie-Michelle Teresa Bernadette Stack Sawarna Crombie.

In short

  • Served as mayor of Mississauga from 2014 to 2024
  • Led the Ontario Liberal Party from 2023 to 2026
  • Previously a federal Liberal MP and city councillor
  • Born 1960, business background before politics
Canadian angle

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.

Quick 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.
What party is Bonnie Crombie?
She is associated with the Ontario Liberal Party and has been a Liberal throughout her political career.
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.

Sources

  1. Wikipedia — https://en.wikipedia.org/wiki/Bonnie_Crombie
    Supports: Birth date, offices held, leadership win, and political overview.
  2. 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.
  3. 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.
  4. City of Mississauga — https://www.mississauga.ca/documents/PressRelease/2014/Bonnie_Crombie_Bio.pdf
    Supports: Municipal biography, prior offices, and professional background.
  5. 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.