J3B 6S9 is Canadian Postal Code located in Vieux-Saint-Jean Quebec.
| Postal Code | J3B 6S9 |
| Forward Sortation Area | J3B |
| Name | Vieux-Saint-Jean |
| Province | Quebec |
| Administrative Division | Le Haut-Richelieu |
| City | Saint-Jean-sur-Richelieu |
| Timezone | Eastern Daylight Time (EDT) |
| Area Code(s) | 450 / 579 |