H1W 1H9 is Canadian Postal Code located in Mercier-Hochelaga-Maisonneuve Quebec.
| Postal Code | H1W 1H9 |
| Forward Sortation Area | H1W |
| Name | Mercier-Hochelaga-Maisonneuve |
| Province | Quebec |
| Administrative Division | Montreal |
| City | Montreal |
| Timezone | Eastern Daylight Time (EDT) |
| Area Code(s) | 438 / 514 |