Mount Royal (French: Mont Royal) is a mountain on the Island of Montreal, immediately north of downtown Montreal, Quebec, Canada, the city to which it gave its name.

The mountain is part of the Monteregian mountain chain situated between the Laurentians and the Appalachians. It gave its Latin name, Mons Regius, to the Monteregian chain.

Contrary to popular belief, Mount Royal is not an extinct volcano; however, it is the result of magma intrusion during the Cretaceous to Tertiary time. It is a site where magma was emplaced into the Earth's crust and crystallized into gabbro; subsequently, the surrounding earth was eroded, leaving the mountain behind.

The mountain consists of three peaks: Colline de la Croix (or Mont Royal proper) at 223 metres (732 feet), Colline d'Outremont (or Mont Murray) at 211 metres (692 feet), and Colline de Westmount at 201 metres (659 feet) elevation above mean sea level. At this height, it might be otherwise considered a very tall hill, but it has always been called a mountain.

This article is licensed under the GNU Free Documentation License.