| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Umtanum | city | Washington | United States | 46.865 | -120.47861 | 1998 | 256 |
| Uncas | city | Washington | United States | 47.98778 | -122.88167 | 229 | 1629 |
| Underwood | city | Washington | United States | 45.72972 | -121.525 | 200 | 7107 |
| Underwood Heights | city | Washington | United States | 45.73583 | -121.52611 | 200 | 7107 |
| Unfried historical | city | Washington | United States | 46.41222 | -117.36389 | 2080 | 885 |
| Union | city | Washington | United States | 47.35528 | -123.09972 | 180 | 1662 |
| Union | city | Washington | United States | 45.70806 | -122.55056 | 255 | 66815 |
| Union Center | city | Washington | United States | 46.74333 | -117.33083 | 2293 | 1687 |
| Union Gap | city | Washington | United States | 46.5575 | -120.47389 | 997 | 42679 |
| Union Mill | city | Washington | United States | 47.03278 | -122.77333 | 196 | 46716 |
| Uniontown | city | Washington | United States | 46.53944 | -117.08667 | 2647 | 126 |
| University | city | Washington | United States | 47.66667 | -122.30861 | 127 | 239108 |
| University Place | city | Washington | United States | 47.23583 | -122.54917 | 295 | 80369 |
| University Village subdivision | city | Washington | United States | 47.66389 | -122.27194 | 157 | 153205 |
| Upper Fairfax | city | Washington | United States | 47.00583 | -121.99917 | 1259 | 139 |
| Upper Mill | city | Washington | United States | 47.19361 | -121.92583 | 1190 | 6363 |
| Upper Preston | city | Washington | United States | 47.50528 | -121.90639 | 600 | 6022 |
| Upper Salmon Junction | city | Washington | United States | 46.35444 | -123.73417 | 200 | 362 |
| Urban | city | Washington | United States | 48.61806 | -122.69083 | 0 | 442 |
| Usk | city | Washington | United States | 48.31389 | -117.27861 | 2040 | 210 |
| Utsalady | city | Washington | United States | 48.25194 | -122.47583 | 200 | 3301 |
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