H1Y 1S4 is Canadian Postal Code located in Rosemont-La Petite-Patrie Quebec.
| Postal Code | H1Y 1S4 |
| Forward Sortation Area | H1Y |
| Name | Rosemont-La Petite-Patrie |
| Province | Quebec |
| Administrative Division | Communauté-Urbaine-de-Montréal |
| City | Montréal |
| Timezone | Eastern Daylight Time (EDT) |
| Area Code(s) | 438 / 514 |