16 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 98225 | Bellingham | 50,355 |
| 98226 | Bellingham | 45,739 |
| 98229 | Bellingham | 33,919 |
| 98248 | Ferndale | 28,061 |
| 98264 | Lynden | 22,365 |
| 98230 | Blaine | 18,757 |
| 98247 | Everson | 8,924 |
| 98266 | Maple Falls | 4,198 |
| 98240 | Custer | 3,208 |
| 98295 | Sumas | 3,135 |
| 98244 | Deming | 3,080 |
| 98276 | Nooksack | 1,547 |
| 98281 | Point Roberts | 1,275 |
| 98262 | Lummi Island | 1,020 |
| 98220 | Acme | 558 |
| 98283 | Rockport | 342 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 16 ZCTAs in Whatcom County, Washington (US Census).