J2T 3T4 is Canadian Postal Code located in Saint-Hyacinthe Quebec.
| Postal Code | J2T 3T4 |
| Forward Sortation Area | J2T |
| Name | Saint-Hyacinthe |
| Province | Quebec |
| Administrative Division | Les Maskoutains Regional County Municipality |
| Timezone | Eastern Daylight Time (EDT) |
| Area Code(s) | 450 / 579 |