There are 27 cities in Whatcom County, Washington.
Note: As defined by the US Census Bureau, a city's official boundaries often extend miles beyond the city itself and may even cross county lines. As such, several thousand US cities officially exist in two or more counties (and therefore appear on multiple counties' lists of cities.)
City | Rank | 2024 Population | 2020 Population | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Bellingham | 1 | 95,669 | 91,871 | 1% | 3,393 | 28.2 | City |
| Lynden | 2 | 16,797 | 15,813 | 1.49% | 3,091 | 5.4 | City |
| Ferndale | 3 | 16,281 | 15,123 | 1.81% | 2,317 | 7.0 | City |
| Sedro-Woolley | 4 | 13,098 | 12,465 | 1.22% | 3,013 | 4.3 | City |
| Birch Bay | 5 | 11,597 | 9,917 | 2% | 679 | 17.1 | CDP |
| Sudden Valley | 6 | 7,213 | 7,407 | 0.77% | 1,686 | 4.3 | CDP |
| Blaine | 7 | 6,342 | 5,900 | 1.76% | 1,135 | 5.6 | City |
| Marietta-Alderwood | 8 | 3,204 | 3,463 | -1.54% | 551 | 5.8 | CDP |
| Everson | 9 | 3,112 | 2,947 | 1.33% | 2,084 | 1.5 | City |
| Peaceful Valley | 10 | 2,614 | 3,187 | -1.88% | 1,044 | 2.5 | CDP |
| Geneva | 11 | 2,058 | 2,596 | -0.92% | 1,496 | 1.4 | CDP |
| Sumas | 12 | 1,684 | 1,606 | 1.14% | 1,148 | 1.5 | City |
| Nooksack | 13 | 1,559 | 1,479 | 1.3% | 1,794 | 0.9 | City |
| Point Roberts | 14 | 1,238 | 1,100 | -0.48% | 253 | 4.9 | CDP |
| Clear Lake | 15 | 1,141 | 1,101 | 0.88% | 422 | 2.7 | CDP |
| Kendall | 16 | 1,087 | 884 | 6.26% | 396 | 2.7 | CDP |
| Concrete | 17 | 782 | 800 | -0.64% | 667 | 1.2 | Town |
| Deming | 18 | 439 | 174 | 1.39% | 160 | 2.8 | CDP |
| Lyman | 19 | 417 | 423 | -0.48% | 621 | 0.7 | Town |
| Alger | 20 | 358 | 150 | -0.83% | 137 | 2.6 | CDP |
| Hamilton | 21 | 293 | 301 | -0.68% | 245 | 1.2 | Town |
| Custer | 22 | 290 | 298 | -2.03% | 129 | 2.2 | CDP |
| Glacier | 23 | 246 | 142 | 0.82% | 147 | 1.7 | CDP |
| Maple Falls | 24 | 216 | 226 | -3.14% | 101 | 2.1 | CDP |
| Marblemount | 25 | 197 | 121 | -0.51% | 53 | 3.7 | CDP |
| Acme | 26 | 91 | 123 | -10.78% | 61 | 1.5 | CDP |
| Rockport | 27 | 51 | 27 | -7.27% | 140 | 0.4 | CDP |
Note: City markers shown outside the county boundary mean that a part of the city extends into this county, but is primarily located in an adjacent county.
Bellingham is the largest city in Whatcom County.
Rockport is the smallest city in Whatcom County.
There are 27 cities in Whatcom County, Washington.