| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| J and L Mobile Home Park | city | Washington | United States | 47.82 | -122.31 | 400 | |
| Jack Travis Estates Mobile Home Park | city | Washington | United States | 46.99 | -122.52 | 400 | |
| Jackson | city | Washington | United States | 46.53 | -117.91 | 1669 | |
| Jackson Park | city | Washington | United States | 47.59 | -122.70 | 3 | |
| James Street Estates Mobile Home Park | city | Washington | United States | 48.78 | -122.46 | 111 | |
| Jameson (historical) | city | Washington | United States | 47.71 | -119.66 | 2509 | |
| Jamestown | city | Washington | United States | 48.13 | -123.09 | 19 | |
| Jamestown Estates Mobile Home Park | city | Washington | United States | 47.12 | -122.53 | 298 | |
| Jamison Corner | city | Washington | United States | 47.94 | -122.01 | 830 | |
| Janis | city | Washington | United States | 48.65 | -119.47 | 898 | |
| Jantz | city | Washington | United States | 47.23 | -118.64 | 1797 | |
| Jared | city | Washington | United States | 48.47 | -117.32 | 2037 | |
| Jensen Trailer Mobile Home Court | city | Washington | United States | 47.70 | -122.35 | 275 | |
| Jericho | city | Washington | United States | 46.83 | -119.79 | 830 | |
| Jerita | city | Washington | United States | 46.74 | -117.89 | 1669 | |
| Jerry | city | Washington | United States | 46.32 | -117.11 | 1210 | |
| Jims Corner | city | Washington | United States | 46.99 | -122.29 | 830 | |
| Johansons Corner | city | Washington | United States | 47.63 | -122.65 | 190 | |
| John Sam Lake | city | Washington | United States | 48.11 | -122.25 | 830 | |
| John's Landing Mobile Home Park | city | Washington | United States | 48.70 | -119.45 | 898 | |
| Johnson | city | Washington | United States | 46.63 | -117.14 | 2700 | |
| Johnson Landing | city | Washington | United States | 47.18 | -122.69 | 98 | |
| Johnsons Corner | city | Washington | United States | 46.98 | -122.36 | 830 | |
| Jordan | city | Washington | United States | 48.15 | -122.04 | 200 | |
| Joso | city | Washington | United States | 46.61 | -118.22 | 830 | |
| Jovita | city | Washington | United States | 47.26 | -122.28 | 298 | |
| Joyce | city | Washington | United States | 48.14 | -123.73 | 830 | |
| Juanita | city | Washington | United States | 47.70 | -122.21 | 75 | |
| Junction | city | Washington | United States | 47.61 | -121.80 | 830 | |
| Junction City | city | Washington | United States | 46.97 | -123.77 | 75 | |
| Juniper Beach | city | Washington | United States | 48.23 | -122.41 | 0 | |
| Juniper Mobile Estates | city | Washington | United States | 48.08 | -123.12 | 242 | |
| Juno | city | Washington | United States | 47.11 | -117.57 | 2083 |