Major Talbot Mercer Papineau MC (25 March 1883 – 30 October 1917) was a Canadian lawyer and military officer from Quebec.

In 1905, he was one of the first Canadians to receive a Rhodes Scholarship, and subsequently studied law at Brasenose College, Oxford.

Through an exchange in newspapers in 1916 he argued with his cousin, the anti-imperialist nationalist leader Henri Bourassa, over support for the war and the British Empire.

He was awarded the Military Cross for his actions in Belgium and he eventually rose to the rank of major.

Trudeau starred in the two-part CBC miniseries, an account of Canada's participation in the First World War,[2] in which Papineau was killed during the Battle of Passchendaele.