L'Assomption Postal Codes: J5W to J6A | Lanaudière, Quebec
Postal Codes for L'Assomption range from J5W to J6A in Lanaudière, Quebec, Canada. To find exact Postal Codes and postcodes within L'Assomption, choose from the districts below.
Postal Codes for Places in L'Assomption
Showing 5 places in L'Assomption. Last verified with official records on May 2, 2026.
| Charlemagne | |
| L'Assomption | |
| L'Épiphanie | |
| Repentigny | |
| Saint-Sulpice |
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Sample Address Format for L'Assomption
[Sender Street Address]
[City, ZIP]
[Country]
Street Address / PO Box
L'Assomption, Lanaudière, Quebec, J5Z
CANADA
L'Assomption on the Map
The map above highlights the geographic boundaries of the L'Assomption regional county municipality in Canada.
L'Assomption Quick Facts
| Country | Canada (CA) |
|---|---|
| Administrative Path | Canada → Quebec → Lanaudière |
| Postal Code | J5W~J6A |
| Province | Quebec |
| Administrative regions | Lanaudière |
| ISO Codes | CA / CAN / 124 |
| Top-level domain (ccTLD) | .ca |
| Coordinates | 45.830705, -73.422209 |
| Places | 5 |
What to Know About L'Assomption
Key Facts
L'Assomption is a regional county municipality (RCM) located in the Lanaudière administrative region of southwestern Quebec, Canada. Situated along the northern bank of the St. Lawrence River, it occupies a strategic position just northeast of Montreal, making it part of the Montreal metropolitan area's outer ring. The RCM covers approximately 255 square kilometers and has a population of around 128,000 residents, serving as an important suburban and agricultural region. L'Assomption is divided into 11 municipalities, including the cities of L'Assomption, Repentigny, and Charlemagne, which form its urban core. The region takes its name from the L'Assomption River that flows through its territory, historically important for transportation and settlement. This RCM provides access to comprehensive postal code information for all its constituent municipalities, towns, and villages to support residents and businesses with accurate addressing and mail delivery services.
Neighboring Regions
- Les Moulins
- Montcalm
- Joliette
- D'Autray