Karen A. McCrimmon[1] OMM CD MPP (née Martin; born 1959) is a Canadian Armed Forces veteran, mediator, and politician.

When the Arrow project was cancelled in 1959, her father found work with Trans-Canada Airlines and moved his family to Timmins, Ontario.

She graduated with a Bachelor of Arts from the University of Windsor in Russian and linguistics,[3] and originally wanted to work in Canada's diplomatic corps.

In July 2006, she was posted to Ramstein, Germany to serve as a Senior Staff Officer at the NATO Air Headquarters.

She was the Liberal candidate for the riding of Carleton—Mississippi Mills in the 2011 federal election, but lost to the Conservative incumbent Gordon O'Connor.

[7] In December 2012, she announced her bid for the leadership of the Liberal Party of Canada[8][9] and, on April 14, 2013, she placed sixth, losing to Justin Trudeau.

McCrimmon was re-elected in 2019, defeating Conservative candidate Justina McCaffrey by a 4,000-vote margin as the Liberals won a minority government.

Karen McCrimmon is a private pilot and is a member of the Women's Executive Network (WXN), CFUW, FMWC, Royal Canadian Legion, and CWIA.