Founded in 1861, Snohomish County is one of 39 counties in the state of Washington. Historically, Snohomish County was formed from Island and King Counties. The city of Everett is the county seat. With FIPS code of 61, Snohomish County has a population of 827,957 and area of 2,087 square miles (5,405 km2).
List of all cities in Snohomish County, WA alphabetically
| City/Town | Postal Code | Area Code |
| Arlington, WA | 98223 | 360/564 |
| Bothell, WA | 98012 | 425/564 |
| 98021 | 425/564 | |
| 98082 | 425/564 | |
| Brier, WA | 98036 | 425/564 |
| Bryant, WA | 98223 | 360/564 |
| Camano City, WA | 98292 | 360/564 |
| Camano Island, WA | 98292 | 360/564 |
| Clearview, WA | 98290 | 360/564 |
| Darrington, WA | 98241 | 360/564 |
| Eastmont, WA | 98204 | 425/564 |
| Edmonds, WA | 98020 | 425/564 |
| 98026 | 425/564 | |
| Elger Bay, WA | 98292 | 360/564 |
| Everett, WA | 98201 | 425/564 |
| 98203 | 425/564 | |
| 98204 | 425/564 | |
| 98205 | 425/564 | |
| 98206 | 425/564 | |
| 98207 | 425/564 | |
| 98208 | 425/564 | |
| 98213 | 425 | |
| Gold Bar, WA | 98251 | 360/564 |
| Granite Falls, WA | 98252 | 360/564 |
| Hartford, WA | 98258 | 425/564 |
| Index, WA | 98256 | 360/564 |
| Kennard Corner, WA | 98021 | 425/564 |
| Lake Stevens, WA | 98258 | 425/564 |
| Larimers Corner, WA | 98290 | 360/564 |
| Lowell, WA | 98203 | 425/564 |
| Lynnwood, WA | 98036 | 425/564 |
| 98037 | 425/564 | |
| 98046 | 425/564 | |
| 98087 | 425/564 | |
| Machias, WA | 98290 | 360/564 |
| Maltby, WA | 98290 | 360/564 |
| Marysville, WA | 98270 | 360/564 |
| Marysville, WA | 98271 | 360/564 |
| Mill Creek, WA | 98012 | 425/564 |
| 98082 | 425/564 | |
| Monroe, WA | 98272 | 360/564 |
| Mountlake Terrace, WA | 98043 | 425/564 |
| Mukilteo, WA | 98275 | 425/564 |
| Naval Station Everett, WA | 98207 | 425/564 |
| North Lakewood, WA | 98259 | 360/564 |
| Novelty, WA | 98272 | 360/564 |
| Oso, WA | 98223 | 360/564 |
| Pinehurst, WA | 98203 | 425/564 |
| Queensborough, WA | 98021 | 425/564 |
| Silvana, WA | 98287 | 360/564 |
| Silver Lake, WA | 98204 | 425/564 |
| Smokey Point, WA | 98223 | 360/564 |
| Snohomish, WA | 98290 | 360/564 |
| 98291 | 360/564 | |
| 98296 | 360/564 | |
| Stanwood, WA | 98292 | 360/564 |
| Startup, WA | 98293 | 360/564 |
| Sultan, WA | 98294 | 360/564 |
| Thrashers Corner, WA | 98021 | 425/564 |
| Tulalip, WA | 98271 | 360/564 |
| Woodway, WA | 98020 | 425/564 |