Founded in 1883, Skagit County is one of 39 counties in the state of Washington. Historically, Skagit County was formed from Whatcom County. The city of Mount Vernon is the county seat. With FIPS code of 57, Skagit County has a population of 129,523 and area of 1,731 square miles (4,483 km2).
List of all cities in Skagit County, WA alphabetically
| 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 |