K0C 2J0 is Canadian Postal Code located in Williamstown Ontario.
| Postal Code | K0C 2J0 |
| Forward Sortation Area | K0C |
| Name | Williamstown |
| Province | Ontario |
| Administrative Division | Stormont, Dundas and Glengarry United Counties |
| Timezone | Eastern Daylight Time (EDT) |
| Area Code(s) | 343 / 613 |