Founded in 1854, Whatcom County is one of 39 counties in the state of Washington. Historically, Whatcom County was formed from Island County. The city of Bellingham is the county seat. With FIPS code of 73, Whatcom County has a population of 226,847 and area of 2,107 square miles (5,457 km2).
List of all cities in Whatcom County, WA alphabetically
| City/Town | Postal Code | Area Code |
| Acme, WA | 98220 | 360/564 |
| Bakerview, WA | 98226 | 360/564 |
| Bellingham, WA | 98225 | 360/564 |
| 98226 | 360/564 | |
| 98227 | 360/564 | |
| 98228 | 360/564 | |
| 98229 | 360/564 | |
| Birch Bay, WA | 98230 | 360/564 |
| Blaine, WA | 98230 | 360/564 |
| 98231 | 360/564 | |
| Chuckanut, WA | 98225 | 360/564 |
| Clearbrook, WA | 98295 | 360/564 |
| Custer, WA | 98240 | 360/564 |
| Deming, WA | 98244 | 360/564 |
| Everson, WA | 98247 | 360/564 |
| 98276 | 360/564 | |
| Fairhaven, WA | 98225 | 360/564 |
| Ferndale, WA | 98248 | 360/564 |
| Glacier, WA | 98244 | 360/564 |
| Kendall, WA | 98244 | 360/564 |
| Lummi Island, WA | 98262 | 360/564 |
| Lynden, WA | 98264 | 360/564 |
| Maple Falls, WA | 98266 | 360/564 |
| Marietta, WA | 98225 | 360/564 |
| Nooksack, WA | 98247 | 360/564 |
| 98276 | 360/564 | |
| Nooksack Indian Reservation, WA | 98244 | 360/564 |
| Pleasant Valley, WA | 98248 | 360/564 |
| Point Roberts, WA | 98281 | 360/564 |
| Saxon, WA | 98220 | 360/564 |
| Silver Beach, WA | 98226 | 360/564 |
| Strandell, WA | 98247 | 360/564 |
| Sumas, WA | 98295 | 360/564 |
| Van Buren, WA | 98247 | 360/564 |
| Welcome, WA | 98244 | 360/564 |