List of cities in Washington List of cities List of cities

| Name_ | County | Population_2012_est_ | Population_2010 | Land_area_ |
|---|---|---|---|---|
| Nooksack | Whatcom | 1355 | 1338 | 0.70 sq mi (1.8 km2) |
| Normandy Park | King | 6504 | 6335 | 2.52 sq mi (6.5 km2) |
| North Bend | King | 6030 | 5731 | 4.27 sq mi (11.1 km2) |
| North Bonneville | Skamania | 963 | 956 | 2.41 sq mi (6.2 km2) |
| Oak Harbor | Island | 22260 | 22075 | 9.42 sq mi (24.4 km2) |
| Oakville | Grays Harbor | 682 | 684 | 0.50 sq mi (1.3 km2) |
| Ocean Shores | Grays Harbor | 5622 | 5569 | 8.51 sq mi (22.0 km2) |
| Okanogan | Okanogan | 2568 | 2552 | 1.95 sq mi (5.1 km2) |
| Olympia | Thurston | 47698 | 46478 | 17.82 sq mi (46.2 km2) |
| Omak | Okanogan | 4881 | 4845 | 3.50 sq mi (9.1 km2) |
| Oroville | Okanogan | 1698 | 1686 | 1.64 sq mi (4.2 km2) |