40 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Seattle | 1 | 791,093 | 740,600 | 1.29% | 9,418 | 84 | City |
| Bellevue | 2 | 155,024 | 151,786 | 0.42% | 4,632 | 33 | City |
| Kent | 3 | 136,586 | 136,593 | 0% | 4,067 | 34 | City |
| Renton | 4 | 105,245 | 106,734 | -0.28% | 4,471 | 24 | City |
| Federal Way | 5 | 100,066 | 100,994 | -0.19% | 4,481 | 22 | City |
| Kirkland | 6 | 96,188 | 92,741 | 0.72% | 5,402 | 18 | City |
| Auburn | 7 | 85,130 | 87,045 | -0.45% | 2,854 | 30 | City |
| Redmond | 8 | 84,400 | 73,374 | 2.68% | 5,094 | 17 | City |
| Shoreline | 9 | 68,108 | 58,820 | 2.8% | 5,854 | 12 | City |
| Sammamish | 10 | 66,230 | 67,449 | -0.37% | 3,242 | 20 | City |
| Bothell | 11 | 52,669 | 48,174 | 1.74% | 3,863 | 14 | City |
| Burien | 12 | 52,058 | 51,996 | 0.02% | 5,186 | 10 | City |
| Issaquah | 13 | 39,554 | 40,103 | -0.28% | 3,261 | 12 | City |
| SeaTac | 14 | 34,683 | 31,387 | 1.94% | 3,446 | 10 | City |
| Des Moines | 15 | 33,286 | 32,889 | 0.24% | 5,190 | 6 | City |
| Maple Valley | 16 | 28,669 | 28,086 | 0.41% | 4,775 | 6 | City |
| Mercer Island | 17 | 25,190 | 25,750 | -0.44% | 3,946 | 6 | City |
| Kenmore | 18 | 24,234 | 23,894 | 0.28% | 3,938 | 6 | City |
| Covington | 19 | 21,743 | 20,862 | 0.82% | 3,665 | 6 | City |
| Tukwila | 20 | 21,608 | 21,748 | -0.13% | 2,353 | 9 | City |
| Woodinville | 21 | 14,058 | 13,475 | 0.83% | 2,504 | 6 | City |
| Edgewood | 22 | 13,764 | 12,422 | 1.99% | 1,642 | 8 | City |
| Snoqualmie | 23 | 13,664 | 14,084 | -0.61% | 1,904 | 7 | City |
| Enumclaw | 24 | 13,311 | 12,620 | 1.05% | 2,572 | 5 | City |
| Lake Forest Park | 25 | 13,194 | 13,604 | -0.62% | 3,751 | 4 | City |
| Newcastle | 26 | 13,053 | 13,145 | -0.15% | 2,943 | 4 | City |
| Fife | 27 | 11,080 | 11,064 | 0.03% | 1,899 | 6 | City |
| Duvall | 28 | 9,458 | 8,046 | 3.07% | 3,859 | 2 | City |
| North Bend | 29 | 8,815 | 7,502 | 3.06% | 2,027 | 4 | City |
| Black Diamond | 30 | 7,272 | 4,846 | 7.15% | 1,102 | 7 | City |
| Pacific | 31 | 7,046 | 7,238 | -0.55% | 2,912 | 2 | City |
| Normandy Park | 32 | 6,637 | 6,757 | -0.36% | 2,670 | 2 | City |
| Algona | 33 | 3,264 | 3,286 | -0.15% | 2,526 | 1 | City |
| Clyde Hill | 34 | 3,165 | 3,127 | 0.22% | 3,000 | 1 | City |
| Medina | 35 | 2,990 | 2,919 | 0.47% | 2,084 | 1 | City |
| Carnation | 36 | 2,308 | 2,161 | 1.27% | 1,993 | 1 | City |
| Yarrow Point | 37 | 1,134 | 1,132 | 0% | 3,098 | 0 | Town |
| Hunts Point | 38 | 461 | 455 | 0.22% | 1,502 | 0 | Town |
| Beaux Arts Village | 39 | 312 | 316 | -0.32% | 3,759 | 0 | Town |
| Skykomish | 40 | 157 | 162 | -0.63% | 500 | 0 | Town |
Seattle is the largest city in King County, with a population of 791,093.
Skykomish is the smallest city in King County, with a population of 157.
There are 40 cities in King County, Washington.