16 ZIP Codes
| Zip Code | City | Population ↓ |
|---|---|---|
| 98225 | Bellingham | 50,216 |
| 98226 | Bellingham | 46,782 |
| 98229 | Bellingham | 33,298 |
| 98248 | Ferndale | 28,498 |
| 98264 | Lynden | 23,123 |
| 98230 | Blaine | 18,744 |
| 98247 | Everson | 9,115 |
| 98266 | Maple Falls | 4,245 |
| 98240 | Custer | 3,593 |
| 98295 | Sumas | 3,279 |
| 98244 | Deming | 2,994 |
| 98276 | Nooksack | 1,794 |
| 98281 | Point Roberts | 1,288 |
| 98262 | Lummi Island | 957 |
| 98220 | Acme | 541 |
| 98283 | Rockport | 442 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 16 ZCTAs in Whatcom County, Washington (US Census).