L'Assomption

L'Assomption
Ville de L'Assomption
Downtown L'Assomption
Location within L'Assomption RCM
L'Assomption
Location in central Quebec
Coordinates: 45°48′40″N 73°25′53″W / 45.81111°N 73.43139°W / 45.81111; -73.43139
CountryCanada
ProvinceQuebec
RegionLanaudière
RCML'Assomption
Settled1670s
ConstitutedJuly 1, 2000
Government
 • MayorSébastien Nadeau
 • Federal ridingRepentigny
 • Prov. ridingL'Assomption
Area
 • City
100.80 km2 (38.92 sq mi)
 • Land98.74 km2 (38.12 sq mi)
 • Urban
12.8 km2 (4.9 sq mi)
Population
 (2021)
 • City
23,442
 • Density237.4/km2 (615/sq mi)
 • Urban
19,834
 • Urban density1,549.5/km2 (4,013/sq mi)
 • Pop 2016–2021
4.5%
 • Dwellings
9,369
Time zoneUTC−05:00 (EST)
 • Summer (DST)UTC−04:00 (EDT)
Postal code(s)
Area codes450 and 579
Highways
A-40

R-339
R-341
R-343
R-344
Websitewww.ville.lassomption.qc.ca

L'Assomption (French pronunciation: [lasɔ̃psjɔ̃]) is an off-island suburb of Montreal, in southwestern Quebec, Canada on the L'Assomption River. It is the seat of the Regional County Municipality of L'Assomption. It is located on the outer fringes of the Montreal urban area.

Most of the economy depends on the agricultural industries of the surrounding plains. It is also the cultural centre of the region.