Identifiers: city · CDP
| Rank | Community | Population |
|---|---|---|
| 1 | Seattle (city), WA | 737,015 |
| 2 | Tacoma (city), WA | 219,346 |
| 3 | Bellevue (city), WA | 151,854 |
| 4 | Kent (city), WA | 136,588 |
| 5 | Renton (city), WA | 106,785 |
| 6 | Federal Way (city), WA | 101,030 |
| 7 | Auburn (city), WA | 87,256 |
| 8 | South Hill (CDP), WA | 64,708 |
| 9 | Lakewood (city), WA | 63,612 |
| 10 | Burien (city), WA | 52,066 |
| 11 | Puyallup (city), WA | 42,973 |
| 12 | Parkland (CDP), WA | 38,623 |
| 13 | Spanaway (CDP), WA | 35,476 |
| 14 | University Place (city), WA | 34,866 |
| 15 | Des Moines (city), WA | 32,888 |
| 16 | SeaTac (city), WA | 31,454 |
| 17 | Maple Valley (city), WA | 28,013 |
| 18 | Mercer Island (city), WA | 25,748 |
| 19 | Frederickson (CDP), WA | 24,906 |
| 20 | Bonney Lake (city), WA | 22,487 |