There are 27 cities in Mason 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 |
|---|---|---|---|---|---|---|---|
| Olympia | 1 | 55,774 | 55,608 | 0.07% | 3,061 | 18.2 | City |
| Bremerton | 2 | 46,058 | 43,624 | 1.34% | 1,620 | 28.4 | City |
| Tumwater | 3 | 27,605 | 26,140 | 1.34% | 1,556 | 17.7 | City |
| Silverdale | 4 | 22,202 | 21,858 | 0.97% | 1,757 | 12.6 | CDP |
| Aberdeen | 5 | 17,009 | 17,028 | -0.03% | 1,564 | 10.9 | City |
| Shelton | 6 | 10,929 | 10,437 | 1.14% | 1,879 | 5.8 | City |
| Belfair | 7 | 4,216 | 4,557 | 0.5% | 572 | 7.4 | CDP |
| Montesano | 8 | 4,189 | 4,148 | 0.24% | 384 | 10.9 | City |
| Elma | 9 | 3,464 | 3,446 | 0.12% | 1,253 | 2.8 | City |
| Chico | 10 | 3,212 | 3,184 | 2.16% | 1,331 | 2.4 | CDP |
| Navy Yard City | 11 | 2,671 | 2,973 | 0.53% | 4,350 | 0.6 | CDP |
| Kitsap Lake | 12 | 2,396 | 1,817 | 7.69% | 2,069 | 1.2 | CDP |
| Allyn | 13 | 2,297 | 2,504 | 1.06% | 1,438 | 1.6 | CDP |
| McCleary | 14 | 2,043 | 2,019 | 0.29% | 997 | 2.0 | City |
| Cosmopolis | 15 | 1,674 | 1,641 | 0.48% | 1,203 | 1.4 | City |
| Rocky Point | 16 | 1,543 | 1,418 | -0.07% | 2,167 | 0.7 | CDP |
| Grapeview | 17 | 1,157 | 703 | 1.31% | 315 | 3.7 | CDP |
| Brady | 18 | 1,010 | 813 | 2.43% | 165 | 6.1 | CDP |
| Erlands Point | 19 | 937 | 768 | 7.7% | 1,985 | 0.5 | CDP |
| Seabeck | 20 | 864 | 854 | -1.93% | 260 | 3.3 | CDP |
| Satsop | 21 | 784 | 638 | 1.03% | 112 | 7.0 | CDP |
| Skokomish | 22 | 648 | 635 | 0.31% | 97 | 6.7 | CDP |
| Gorst | 23 | 479 | 255 | -1.64% | 754 | 0.6 | CDP |
| Union | 24 | 368 | 327 | -4.91% | 227 | 1.6 | CDP |
| Malone | 25 | 319 | 341 | -3.33% | 35 | 9.0 | CDP |
| Porter | 26 | 136 | 129 | -3.55% | 15 | 8.9 | CDP |
| Hoodsport | 27 | 126 | 139 | -12.5% | 120 | 1.1 | 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.
Olympia is the largest city in Mason County.
Hoodsport is the smallest city in Mason County.
There are 27 cities in Mason County, Washington.