Louis B. "Papa" Lausier (November 17, 1879 - January 14, 1962) was a Maine politician. Lausier was born in 1879 in Biddeford to Antoine and Aurilie (Cartier) Lausier. He studied at the Collège de Sainte-Anne-de-la-Pocatière in Quebec before returning to Biddeford to study law under Maine Supreme Judicial Court Justice George F. Haley. He passed the Maine bar in 1906 and entered Biddeford municipal government, holding the positions of city auditor, municipal judge and alderman. A Democrat, Lausier represented Biddeford, Maine in the Maine House of Representatives from 1919-20 and 1925–26. Lausier was a delegate to the Democratic National Convention in 1940 and 1948. In 1948, Lausier sought and received his party's nomination for Governor of Maine. He lost to Republican Frederick G. Payne, gaining 34% of the vote. Lausier served as mayor of Biddeford from 1941–55. While mayor, Lausier was fiscally conservative and refused for the city to obtain debt. While mayor, many criticized him for ignoring non Franco-Americans living in the town, especially because of the poor quality of the public schools. He was defeated in the Democratic primary for mayor in 1955 by Albert C. Lambert.