The following population figures are 2010 Whatcom County estimates from the Washington State Office of Financial Management:
| Bellingham | 77,550 |
| Lynden | 11,850 |
| Ferndale | 11,210 |
| Blaine | 4,790 |
| Everson | 2,305 |
| Sumas | 1,319 |
| Nooksack | 1,230 |
| Unincorporated areas | 85,246 |
| Total Whatcom County | 195,500 |
