The Diocese of Mont-Laurier (Latin: Dioecesis Montis Laurei) was a former Latin Church diocese that included part of the Province of Quebec.

The Vatican's website, as of 2011, gives an area of 19,968 (units not given); a total population of 95,256; a Catholic population of 77,340; 35 priests; 1 permanent deacon; and 58 religious.

After Bishop Lortie's retirement, this diocese came under an Apostolic Administrator, Most Rev.

Paul-André Durocher, Archbishop of Gatineau, the metropolitan of the ecclesiastical province which includes this diocese.

On June 1, 2020, Pope Francis appointed Raymond Poisson to serve as Bishop of Mont-Laurier, concurrently as Bishop of Saint-Jerome, in the form of in persona episcopi ("in the persons of the bishop").