David Lametti

His Excellency the Honourable
David Lametti
PC KC
His Excellency the Honourable David Lametti PC KC
	Lametti in 2017
26th Canadian Ambassador to the United Nations
	Incumbent
	Assumed office ; November 17, 2025
Prime Minister	Mark Carney
Preceded by	Bob Rae
39th Principal Secretary; to the Prime Minister of Canada
	In office; July 14, 2025 – September 17, 2025 Serving with Tom Pitfield
Prime Minister	Mark Carney
Preceded by	Tom Pitfield (interim)
Succeeded by	Tom Pitfield
Minister of Justice; Attorney General of Canada
	In office; January 14, 2019 – July 26, 2023
Prime Minister	Justin Trudeau
Preceded by	Jody Wilson-Raybould
Succeeded by	Arif Virani
Parliamentary Secretary to the Minister of Innovation, Science and Economic Development
	In office; January 30, 2017 – January 14, 2019
Minister	Navdeep Bains
Preceded by	Greg Fergus
Succeeded by	Position abolished
Parliamentary Secretary to the Minister of International Trade
	In office; December 2, 2015 – January 27, 2017
Minister	Chrystia Freeland; François-Philippe Champagne
Preceded by	Parm Gill
Succeeded by	Pamela Goldsmith-Jones
Member of Parliament; for LaSalle—Émard—Verdun
	In office; October 19, 2015 – February 1, 2024
Preceded by	Hélène LeBlanc
Succeeded by	Louis-Philippe Sauvé
Personal details
Born	David T. Lametti; August 10, 1962; Port Colborne, Ontario, Canada
Party	Liberal
Education	University of Toronto (BA); McGill University (LLB, BCL); Yale University (LLM); Exeter College, Oxford (DPhil);

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David T. Lametti (born August 10, 1962) is a Canadian diplomat, lawyer, and former politician who has served as the Canadian ambassador to the United Nations since November 17, 2025. Lametti was previously Minister of Justice and Attorney General of Canada from 2019 to 2023. A member of the Liberal Party, he was the member of Parliament (MP) for LaSalle—Émard—Verdun from 2015 to 2024. After leaving electoral politics, he was Principal Secretary to Prime Minister Mark Carney from July to September 2025.

Born in Port Colborne, Ontario, Lametti graduated from University of Toronto and studied law at McGill University, Yale University, and Exeter College, Oxford. Prior to entering politics, he was a professor of law at McGill University, a member of the Institute of Comparative Law, and a founding member of the Centre for Intellectual Property Policy.