Joseph Adélard Dubeau (March 25, 1873 – October 10, 1937) was a Canadian politician.

Born in Saint-Ambroise-de-Kildare, Quebec, Dubeau was educated at the College of Joliette and read law in the office of Joseph-Mathias Tellier, the M.L.A.

He was first elected to the House of Commons of Canada for the electoral district of Joliette in the general elections of 1904.

A Liberal, he was re-elected in 1908 and was defeated in 1911 and 1917.

This article about a Quebec Member of Parliament from the Liberal Party of Canada is a stub.