Papineau is a federal electoral district in Montreal, Quebec, Canada, that has been represented in the House of Commons of Canada from 1948 to 1988 and since 2004. Its population in 2006 was 101,019. Justin Trudeau, who is currently Prime Minister of Canada and Leader of the Liberal Party, has represented the riding since the 2008 federal election.
The name of the riding comes from a street in the Villeray neighbourhood, named after Joseph Papineau.
At nine square kilometres, it covers the smallest area of any federal riding in Canada. Linguistically, 45% of residents list French as their mother tongue, 8% list English, and 47% list neither English nor French, with large groups speaking Spanish, Italian, Greek and Arabic. The total immigrant population is 40 per cent.