Arthur-Lucien Beaubien (February 11, 1879 – March 21, 1971) was a Canadian politician and farmer.
Born in Arthabaska, Quebec, he was elected to the Canadian House of Commons in the 1921 election as a Member of the Liberal Party to represent the riding or electoral district of Provencher. He was re-elected in 1926 then became a Liberal Progressive. He was then re-elected in 1935 and switched back to the Liberal Party.
In 1940, he was appointed to the Canadian senate upon the advice of Mackenzie King to the senate division of Provencher, Manitoba. He was made Government Whip in the Senate in 1951 until 1957. He became the Senate Opposition Whip in 1958 until 1962 then served another term as Senate Government Whip from 1964 to 1969.
Beaubien also served on various standing committees. He was Chair of the Special Committee on the Canadian Radio Broadcasting Commission during the 18th Parliament. He sat on the Standing Joint Committee on the Parliamentary Restaurant, during the 18th Parliament as well as numerous Senate committees. Prior to his federal political experience, he was reeve of Montcalm, Manitoba in 1921.