Marc Beaudoin (born 1935 died 2012) is a judge and former politician in the Canadian province of Quebec. He served on the Montreal city council from 1978 to 1986 as a member of mayor Jean Drapeau's Civic Party and was a member of the Montreal executive committee (i.e., the municipal cabinet). In 1991, he was appointed as a judge on the Quebec Superior Court.
Beaudoin was a lawyer in private life. A Montreal Gazette report indicates that he was fifty years old in 1986.
Beaudoin was first elected to the Montreal city council in the 1978 municipal election and was re-elected in 1982. He served as vice-president of the Montreal executive committee for a time and was chair of council from 1982 to 1986. In May 1986, Beaudoin presided over the first Montreal city council meeting in which journalists were allowed to bring cameras and recording equipment into the chambers.
When Drapeau announced his retirement in 1986, Beaudoin supported Claude Dupras's successful bid to become the Civic Party's new leader and mayoral candidate. Dupras was defeated by Montreal Citizens' Movement candidate Jean Doré in the general election, while Beaudoin was defeated in Gabriel-Sagard by MCM candidate Vittorio Capparelli.
Beaudoin became the Civic Party's vice-president after the election. He resigned from the party executive in February 1989, saying that the party's attempts at democratization "[had] not achieved the desired results."
Beaudoin was a supporter of the Progressive Conservative Party of Canada at the federal level. He was chosen as president of the party's Rosemont association in August 1988, with support from the party establishment. Rosemont's Member of Parliament (MP) at the time was Suzanne Blais-Grenier, who questioned the legitimacy of Beaudoin's election and suggested that it was part of an effort to pressure her into resigning. Her supporters set up a rival association with a different president, and a quarrel ensued as to which group controlled the local party finances.