J5W 1C4 is Canadian Postal Code located in L'Assomption Quebec.
| Postal Code | J5W 1C4 |
| Forward Sortation Area | J5W |
| Name | L'Assomption |
| Province | Quebec |
| Administrative Division | L'Assomption Regional County Municipality |
| Timezone | Eastern Daylight Time (EDT) |
| Area Code(s) | 450 / 579 |