Beauharnois is a city located in the Beauharnois-Salaberry Regional County Municipality of southwestern Quebec, Canada, and is part of Greater Montreal Area. The city's population as of the Canada 2011 Census was 12,011. It is home to the Beauharnois Hydroelectric Power Station, one of the largest hydroelectric generating stations in the world, as well as the Beauharnois Lock of the Saint Lawrence Seaway. In 2012, OVH started construction of its first Canadian data centre in Beauharnois, one of the largest in the world. OVH's data centre is claimed to be powered by Beauharnois Hydroelectric Power Station, and is located 300 meters from it.HistoryAs part of the 2000–2006 municipal reorganization in Quebec, the neighbouring towns of Maple Grove and Melocheville were amalgamated into Beauharnois on January 1, 2002.GeographyCommunitiesThe following locations reside within the municipality's boundaries: Domaine-de-la-Pointe-des-Érables - a residential area north of Maple GroveMaple Grove - a former municipality that makes up the northeast boundary of BeauharnoisMelocheville - a former municipality that makes up the western boundary of Beauharnois, located on the west shore of the Beauharnois CanalParc-Tisseur - a residential area in southern BeauharnoisRivière-Nord - a hamlet in southern BeauharnoisSaint-Paul - a residential area located on Route 205