| City/Town | Postal Code | Area Code |
| Alger, WA | 98233 | 360/564 |
| Allen, WA | 98232 | 360/564 |
| Anacortes, WA | 98221 | 360/564 |
| Bow, WA | 98232 | 360/564 |
| Burlington, WA | 98233 | 360/564 |
| Clearlake, WA | 98235 | 360/564 |
| Concrete, WA | 98237 | 360/564 |
| Conway, WA | 98238 | 360/564 |
| Decatur Island, WA | 98221 | 360/564 |
| Diablo, WA | 98283 | 360/564 |
| Edison, WA | 98232 | 360/564 |
| Guemes, WA | 98221 | 360/564 |
| Guemes Island, WA | 98221 | 360/564 |
| Hamilton, WA | 98255 | 360/564 |
| La Conner, WA | 98257 | 360/564 |
| Lyman, WA | 98263 | 360/564 |
| Marblemount, WA | 98267 | 360/564 |
| Mount Vernon, WA | 98273 | 360/564 |
| 98274 | 360/564 | |
| Newhalem, WA | 98283 | 360/564 |
| Rockport, WA | 98283 | 360/564 |
| Samish Island, WA | 98232 | 360/564 |
| Sedro Woolley, WA | 98284 | 360/564 |
| Similk Beach, WA | 98221 | 360/564 |
| Upper Skagit Indian Reservat, WA | 98233 | 360/564 |