Marc Demers is a Canadian politician, who served as mayor of Laval from 2013 to 2021.

[6] Demers was born in August 1951 to a father who owned a private investigating firm and who was once an RCMP officer.

[3] Demers' father died young in 1959 and his dad's once successful business went bankrupt.

[3] In the early 1980s he discovered that the former mayor of Laval, Gilles Vaillancourt, was engaged in fraudulent activity.

[4] Demers found evidence that councilor Vaillancourt, at the time, held money in a local credit union under a false name to avoid paying more income taxes.