K6H 3Z3 is Canadian Postal Code located in Cornwall Ontario.
| Postal Code | K6H 3Z3 |
| Forward Sortation Area | K6H |
| Name | Cornwall |
| Province | Ontario |
| Administrative Division | Stormont, Dundas and Glengarry United Counties |
| Timezone | Eastern Daylight Time (EDT) |
| Area Code(s) | 343 / 613 |