K1W 1A1 is Canadian Postal Code located in Gloucester Ontario.
| Postal Code | K1W 1A1 |
| Forward Sortation Area | K1W |
| Name | Gloucester |
| Province | Ontario |
| Administrative Division | Ottawa Division |
| City | Ottawa |
| Timezone | Eastern Daylight Time (EDT) |
| Area Code(s) | 343 / 613 |