Marcelle Mersereau, (born February 14, 1942, inPointe-Verte, New Brunswick) is a Canadian politician.

Acivil servant for most of her career, she also served as a councillor onBathurst, New Brunswickcity council while on the provincial payroll from 1980 to 1991. She resigned her seat on council upon being elected to theLegislative Assembly of New Brunswick in the1991 provincial election. A member ofFrank McKenna'sLiberal Party, she was immediately named tocabinet and becamedeputy premier in 1994. She served in a variety of roles in cabinet until the defeat of the Liberals in the1999 election. She defeatedPC candidate Robert N. Stairs to retain her seat inBathurst, one of only 10 Liberals to survive what was their worst ever electoral defeat.

Inopposition she was a top critic and the media reported she had lost the vote in hercaucus to becomeinterim leader of her party by a margin of 4-3 following the resignation ofCamille Thériault. Her most high-profile role in opposition was that offinance critic. She did not seek re-election to the legislature in2003 but has remained active in her party. She was elected vice president of the New Brunswick Liberal Association on October 4, 2003, and re-elected on October 15, 2005. During the2004 federal election, she was co-chair of the Liberal campaign in New Brunswick. She was theLiberal candidate for theHouse of Commons of Canada in theriding ofAcadie—Bathurst in the2006 federal election, but finished second toYvon Godin of theNew Democratic Party.

She served as co-chair of the successful Liberal campaign as it prepared for the2006 provincial election. She succeededGreg Byrne as president of the New Brunswick Liberal Party when he resigned after being appointed to the cabinet following the 2006 election and served the post until stepping down in the Fall of 2007.

• List of Women MLAs, New Brunswick Legislative Library

• 1942 births
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• 21st-century members of the Legislative Assembly of New Brunswick

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