Michel Mathieu, QC (December 20, 1838 – July 30, 1916) was a Quebec lawyer, notary, judge and political figure.

In 1892, he was appointed to a royal commission in the province to investigate allegations of corruption in the government of Honoré Mercier; he did not complete this task due to health problems.

In 1869, with Adolphe Germain, he founded La Revue légale, a legal periodical; in 1884, it was purchased by Amédée Périard but Mathieu continued as editor until 1892.

He published a weekly newspaper in Sorel, Le Courrier de Richelieu, from 1872 to 1874.

He also published several legal reference books, including editions of the Civil and Municipal codes.