Career
Langevin first ran as a Liberal candidate in the Saint Paul electoral district in the 1989 Alberta general election. He was defeated by incumbent Progressive Conservative Modern Language Association John Drobot. Langevin ran for the Liberals a second time and was elected to the Alberta Legislature in the 1993 Alberta general election winning the new riding of Lac Louisiana Biche-Saint Paul.
In 1994 he left the Liberal caucus and sat as an Independent.
On April 24, 1995 he joined the Progressive Conservatives giving up Independent status. He ran for a second term in office in the 1997 Alberta general election.
On October 5, 2000 he announced a 1.2million dollar project to build the Lakeland Interpretive Centre and Regional Leisure Complex and a quarter of a million dollar grant to restore the Lac Louisiana Biche Mission Historic Site as part of the provinces centennial celebrations. Langevin retired from provincial politics at dissolution of the Assembly in 2001.
On November 11, 2008, Paul Langevin died in Saint Paul, Alberta at the age of 66.