| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Kachess Resort | city | Washington | United States | 47.33278 | -121.25278 | 2230 | 277 |
| Kahlotus | city | Washington | United States | 46.64333 | -118.55583 | 1000 | 89 |
| Kalaloch | city | Washington | United States | 47.60472 | -124.37111 | 19 | 19 |
| Kalama | city | Washington | United States | 46.00861 | -122.84333 | 180 | 2884 |
| Kamilche | city | Washington | United States | 47.13056 | -123.09667 | 200 | 6544 |
| Kanaskat | city | Washington | United States | 47.32056 | -121.8925 | 997 | 2812 |
| Kanaskat Junction | city | Washington | United States | 47.33222 | -121.89056 | 1072 | 2812 |
| Kangley | city | Washington | United States | 47.36194 | -121.87889 | 1535 | 3274 |
| Kapowsin | city | Washington | United States | 46.98583 | -122.22444 | 777 | 3430 |
| Karamin | city | Washington | United States | 48.77333 | -118.64806 | 2395 | 251 |
| Kariotis subdivision | city | Washington | United States | 47.62611 | -122.60667 | 311 | 42402 |
| Keller | city | Washington | United States | 48.07889 | -118.68389 | 1610 | 61 |
| Kellys Korner | city | Washington | United States | 46.985 | -122.76694 | 242 | 28933 |
| Kelso | city | Washington | United States | 46.14694 | -122.90722 | 180 | 36633 |
| Kendall | city | Washington | United States | 48.91722 | -122.13472 | 531 | 283 |
| Kenilworth | city | Washington | United States | 47.6325 | -122.10556 | 200 | 88499 |
| Kenmore | city | Washington | United States | 47.7575 | -122.24278 | 157 | 113692 |
| Kennard Corner | city | Washington | United States | 47.82028 | -122.20639 | 200 | 72905 |
| Kennewick | city | Washington | United States | 46.21139 | -119.13611 | 400 | 64890 |
| Kennydale | city | Washington | United States | 47.52083 | -122.20556 | 29 | 92402 |
| Kenova | city | Washington | United States | 47.20694 | -117.55194 | 2198 | 196 |
| Kent | city | Washington | United States | 47.38111 | -122.23361 | 187 | 88764 |
| Kenwood subdivision | city | Washington | United States | 47.73056 | -122.29694 | 226 | 199815 |
| Kerriston | city | Washington | United States | 47.455 | -121.85639 | 1446 | 4804 |
| Ketron | city | Washington | United States | 47.15444 | -122.61694 | 301 | 32702 |
| Kettle Falls | city | Washington | United States | 48.61083 | -118.05472 | 1617 | 370 |
| Kewa | city | Washington | United States | 48.20111 | -118.2775 | 1889 | 64 |
| Keyport | city | Washington | United States | 47.70222 | -122.61972 | 0 | 27116 |
| Keystone | city | Washington | United States | 48.16389 | -122.63056 | 0 | 2419 |
| Keystone | city | Washington | United States | 48.56194 | -119.48194 | 1269 | 334 |
| Keystone | city | Washington | United States | 47.24083 | -118.15028 | 1961 | 170 |
| Keystone Ferry Landing | city | Washington | United States | 48.15944 | -122.67 | 0 | 1757 |
| Kibler | city | Washington | United States | 46.08806 | -118.21944 | 1397 | 2836 |
| Kickerville | city | Washington | United States | 48.88528 | -122.70278 | 213 | 7494 |
| Kid Valley | city | Washington | United States | 46.37306 | -122.61806 | 816 | 219 |
| King Corner | city | Washington | United States | 45.79472 | -122.59861 | 223 | 11147 |
| King Hill | city | Washington | United States | 48.03833 | -123.27361 | 1062 | 2311 |
| Kingsgate | city | Washington | United States | 47.72722 | -122.17833 | 200 | 107262 |
| Kingston | city | Washington | United States | 47.79889 | -122.49694 | 0 | 3584 |
| Kinneyville historical | city | Washington | United States | 46.20778 | -119.79111 | 649 | 6035 |
| Kiona | city | Washington | United States | 46.24972 | -119.47639 | 528 | 1999 |
| Kirby | city | Washington | United States | 46.51333 | -117.38972 | 2516 | 33 |
| Kirkland | city | Washington | United States | 47.68167 | -122.2075 | 75 | 105493 |
| Kitsap Lake | city | Washington | United States | 47.58306 | -122.70722 | 200 | 48783 |
| Kittitas | city | Washington | United States | 46.98333 | -120.41583 | 1646 | 261 |
| Kitts Corner | city | Washington | United States | 47.29722 | -122.31194 | 357 | 97211 |
| Kitzmiller | city | Washington | United States | 46.75833 | -117.16667 | 2598 | 11366 |
| Klaber | city | Washington | United States | 46.56194 | -123.12667 | 400 | 815 |
| Klahanie | city | Washington | United States | 47.43139 | -122.43528 | 0 | 5626 |
| Klaus | city | Washington | United States | 46.57639 | -122.8375 | 400 | 2880 |
| Klickitat | city | Washington | United States | 45.81722 | -121.15139 | 1115 | 459 |
| Klickitat Heights | city | Washington | United States | 45.78278 | -121.32222 | 2372 | 526 |
| Klickitat Springs | city | Washington | United States | 45.82111 | -121.11611 | 777 | 437 |
| Klipsan Beach | city | Washington | United States | 46.46667 | -124.05167 | 22 | 1893 |
| Knapp | city | Washington | United States | 45.73806 | -122.73139 | 177 | 22228 |
| Knapp Landing | city | Washington | United States | 45.73944 | -122.75417 | 147 | 7675 |
| Knappton | city | Washington | United States | 46.27667 | -123.81361 | 0 | 194 |
| Koontzville | city | Washington | United States | 48.01583 | -118.94611 | 1066 | 316 |
| Kooskooskie | city | Washington | United States | 46.01028 | -118.11917 | 2086 | 370 |
| Kopiah | city | Washington | United States | 46.70611 | -122.80667 | 400 | 1004 |
| Koren | city | Washington | United States | 46.79528 | -119.01528 | 1227 | 747 |
| Kosmos | city | Washington | United States | 46.49806 | -122.18667 | 744 | 619 |
| Krain | city | Washington | United States | 47.24306 | -121.98806 | 748 | 10488 |
| Kruse | city | Washington | United States | 48.1 | -122.17389 | 49 | 34136 |
| Kruse Junction | city | Washington | United States | 48.10417 | -122.17861 | 59 | 34136 |
| Kulshan | city | Washington | United States | 48.8375 | -122.13667 | 442 | 112 |
| Kulzer | city | Washington | United States | 48.15056 | -117.72361 | 1952 | 468 |
| Kummer | city | Washington | United States | 47.28694 | -122.02 | 469 | 10263 |
| Kumtux | city | Washington | United States | 45.78944 | -122.51972 | 370 | 12362 |
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