William Albert Boucher (November 12, 1889, in St. Louis, Northwest Territories – June 23, 1976) was a Métis politician, farmer and merchant.

He was born in St. Louis in what is now Saskatchewan but was, at the time, part of the North West Territories.

His brother-in-law was Saskatchewan Liberal MLA Arthur Jules Marion.

[1] He was elected to the House of Commons of Canada as a Member of the Liberal Party in 1948 to represent the riding of Rosthern after the resignation of Walter Adam Tucker on June 8, 1948, and a by-election next October 25.

During his tenure in the Senate, he was a member of numerous Senate committees including the Standing Committees on Rules and Orders, External Relations, Immigration and Labour, Natural Resources, and on Public Health and Welfare, as well as the Special Committee on Criminal Code (Hate Propaganda).