Roussillon Regional County Municipality

Roussillon
Location in province of Quebec.
Coordinates: 45°22′N 73°34′W / 45.367°N 73.567°W / 45.367; -73.567
Country Canada
Province Quebec
RegionMontérégie
EffectiveJanuary 1, 1982
Named afterRégiment Royal Roussillon
County seatSaint-Constant
Government
 • TypePrefecture
 • PrefectNathalie Simon
Area
 • Total
403.60 km2 (155.83 sq mi)
 • Land423.82 km2 (163.64 sq mi)
 There is an apparent
contradiction between two
authoritative sources
Population
 (2016)
 • Total
171,443
 • Density404.5/km2 (1,048/sq mi)
 • Change
2011–2016
5.7%
 Population excludes incompletely enumerated First Nations reserves
Time zoneUTC−5 (EST)
 • Summer (DST)UTC−4 (EDT)
Area codes450 and 579
Websitewww.mrcroussillon.qc.ca

Roussillon (French pronunciation: [ʁusijɔ̃] ) is a regional county municipality in the Montérégie region of Quebec, Canada. The seat is in Saint-Constant, Quebec. The region's population was 171,443 as of the 2016 census.