Arthur Lachance (June 22, 1868 – March 1, 1945) was a Canadian politician.
Born in Quebec City, Quebec, Lachance was educated at the Christian Brothers' School, Quebec Seminary and Laval University.
A crown attorney, crown prosecutor, lawyer, was first elected to Parliament by acclamation in a 1905 by-election in the electoral district of Quebec-Centre after the current MP, Albert Malouin, was appointed a Puisne Judge of the Superior Court of Quebec, Arthabasca District.