James Allison Glen (December 18 1877 - June 28 1950) was a Canadian parliamentarian and Speaker of the Canadian House of Commons from 1940 to 1945.

Born and raised in Scotland, Glen graduated in law from the University of Glasgow before immigrating to Canada in 1911 where he settled in Winnipeg before moving to Russell, Manitoba where he practiced law and was elected to the school board.

A supporter of the Progressive Party in Manitoba, Glen had been the chief organizer for party leader Thomas Crerar in the 1917 Canadian election (when Crerar was a Liberal Unionist) and the 1921 Canadian election in which the Progressives made their debut. was first elected to the Canadian House of Commons in the 1926 Canadian election as a Liberal-Progressive at a time when Manitoba Progressives, including the Manitoba Progressive Party provincial government, had decided to align with the Liberals in order to increase their influence. Glen remained a Liberal-Progressive in name until the 1945 Canadian election when he ran as a Liberal after being appointed to the Canadian Cabinet but, in practice he and his fellow Liberal-Progressives were Liberals in every respect.

After losing his seat in the 1930 Canadian election, Glen returned to Parliament in 1935.

Glen was chosen as Speaker of the House following the 1940 election and had to deal with issues of wartime security such as censoring Hansard in order to remove sensitive military information. Due to the international situation and wartime moblization there was a greater degree of interparty cooperation during the war which assisted Glen in his job.

Immediately prior to the 1945 election, Mackenzie King appointed Glen to the Canadian Cabinet as Minister of Mines and Resources and held the position until he retired from Cabinet following a heart attack in 1948. A few months later Glen resigned from the House of Commons in order to provide a seat for Stuart Garson, the Premier of Manitoba who had been enticed to join the federal Cabinet as Minister of Justice. Glen was appointed Canadian Co-Chairman of the International Joint Commission. He died two years later.