| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Jackson | city | Washington | United States | 46.53444 | -117.91194 | 1338 | 120 |
| Jackson Park subdivision | city | Washington | United States | 47.58778 | -122.69444 | 3 | 53655 |
| Jameson historical | city | Washington | United States | 47.71389 | -119.66278 | 2263 | 221 |
| Jamestown | city | Washington | United States | 48.12833 | -123.08583 | 19 | 6215 |
| Jamison Corner | city | Washington | United States | 47.93556 | -122.01083 | 570 | 12856 |
| Janis | city | Washington | United States | 48.6475 | -119.46417 | 898 | 542 |
| Jantz | city | Washington | United States | 47.23 | -118.64139 | 1797 | 170 |
| Jared | city | Washington | United States | 48.46917 | -117.31444 | 2037 | 196 |
| Jericho | city | Washington | United States | 46.83472 | -119.79028 | 600 | 453 |
| Jerita | city | Washington | United States | 46.74306 | -117.88583 | 1597 | 126 |
| Jerry | city | Washington | United States | 46.32444 | -117.1075 | 1210 | 383 |
| Jims Corner | city | Washington | United States | 46.995 | -122.29333 | 672 | 9994 |
| Johansons Corner | city | Washington | United States | 47.63 | -122.65139 | 190 | 51123 |
| John Sam Lake | city | Washington | United States | 48.10944 | -122.24472 | 475 | 17206 |
| Johnson | city | Washington | United States | 46.63167 | -117.13694 | 2700 | 1753 |
| Johnson Landing | city | Washington | United States | 47.18417 | -122.68917 | 98 | 3243 |
| Johnsons Corner | city | Washington | United States | 46.98056 | -122.35639 | 597 | 9672 |
| Jordan | city | Washington | United States | 48.14806 | -122.03611 | 200 | 2066 |
| Joso | city | Washington | United States | 46.61167 | -118.2175 | 633 | 130 |
| Jovita | city | Washington | United States | 47.26111 | -122.28056 | 298 | 61773 |
| Joyce | city | Washington | United States | 48.13667 | -123.73278 | 456 | 174 |
| Juanita | city | Washington | United States | 47.70333 | -122.20583 | 75 | 105493 |
| Junction | city | Washington | United States | 47.61389 | -121.80111 | 813 | 1406 |
| Junction City | city | Washington | United States | 46.97111 | -123.77222 | 75 | 16011 |
| Juniper Beach | city | Washington | United States | 48.23111 | -122.40583 | 0 | 3645 |
| Juno | city | Washington | United States | 47.115 | -117.57389 | 2083 | 196 |
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