| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
| La Center | city | Washington | United States | 45.8625 | -122.66917 | 131 | 5896 |
| La Conner | city | Washington | United States | 48.38889 | -122.495 | 9 | 4021 |
| La Crosse | city | Washington | United States | 46.81417 | -117.88083 | 1509 | 135 |
| La Grande | city | Washington | United States | 46.83444 | -122.3175 | 800 | 1380 |
| La Push | city | Washington | United States | 47.90889 | -124.63528 | 52 | 65 |
| Lacamas | city | Washington | United States | 46.56111 | -122.65056 | 711 | 759 |
| Lacey | city | Washington | United States | 47.03444 | -122.82194 | 200 | 54197 |
| Lackawanna Beach | city | Washington | United States | 47.64972 | -122.90389 | 0 | 1012 |
| Ladow | city | Washington | United States | 46.98583 | -117.08444 | 2637 | 397 |
| Laidlow | city | Washington | United States | 46.86167 | -124.0725 | 3 | 951 |
| Laing | city | Washington | United States | 47.11556 | -119.03917 | 1266 | 430 |
| Lairds | city | Washington | United States | 46.91389 | -117.08639 | 2598 | 399 |
| Lake Bay | city | Washington | United States | 47.25194 | -122.73722 | 3 | 3613 |
| Lake Bosworth | city | Washington | United States | 48.04528 | -121.96722 | 626 | 1556 |
| Lake Cavanaugh | city | Washington | United States | 48.32639 | -122.01972 | 1010 | 1079 |
| Lake Chelan Hills subdivision | city | Washington | United States | 47.85472 | -120.06028 | 1135 | 1242 |
| Lake City | city | Washington | United States | 47.14889 | -122.55 | 298 | 63403 |
| Lake City | city | Washington | United States | 47.71778 | -122.2825 | 170 | 154230 |
| Lake Forest Park | city | Washington | United States | 47.75694 | -122.27972 | 75 | 144422 |
| Lake Goodwin | city | Washington | United States | 48.13917 | -122.27833 | 498 | 9323 |
| Lake Heights | city | Washington | United States | 47.55917 | -122.18278 | 285 | 96569 |
| Lake Hills | city | Washington | United States | 47.61361 | -122.12028 | 200 | 89027 |
| Lake Ketchum | city | Washington | United States | 48.28472 | -122.34278 | 219 | 4387 |
| Lake Park | city | Washington | United States | 47.72111 | -122.24611 | 396 | 114313 |
| Lake Roesiger | city | Washington | United States | 47.98361 | -121.92806 | 790 | 3256 |
| Lake Shore | city | Washington | United States | 45.69083 | -122.68972 | 200 | 67813 |
| Lake Stevens | city | Washington | United States | 48.01528 | -122.0625 | 200 | 19453 |
| Lakebay | city | Washington | United States | 47.25722 | -122.75722 | 62 | 3245 |
| Lakedale | city | Washington | United States | 48.5725 | -123.08278 | 200 | 2893 |
| Lakedale | city | Washington | United States | 47.25417 | -121.05611 | 2417 | 279 |
| Lakeland Village | city | Washington | United States | 47.55111 | -117.70389 | 2398 | 7131 |
| Lakeridge | city | Washington | United States | 47.50667 | -122.24333 | 203 | 108335 |
| Lakeshore | city | Washington | United States | 45.69028 | -122.69444 | 200 | 67813 |
| Lakeside | city | Washington | United States | 47.83556 | -120.04917 | 1689 | 1242 |
| Lakeview | city | Washington | United States | 47.15944 | -122.49694 | 301 | 101160 |
| Lakeview | city | Washington | United States | 47.37417 | -119.50111 | 1233 | 5225 |
| Lakeview Park | city | Washington | United States | 47.37667 | -119.50667 | 1269 | 2970 |
| Lakeway subdivision | city | Washington | United States | 48.74278 | -122.44556 | 400 | 41827 |
| Lakewood | city | Washington | United States | 47.17194 | -122.51722 | 262 | 121138 |
| Lakewood | city | Washington | United States | 47.56333 | -122.27056 | 3 | 136589 |
| Lakewood | city | Washington | United States | 48.15222 | -122.20611 | 141 | 21378 |
| Lakota | city | Washington | United States | 47.33306 | -122.37111 | 141 | 82507 |
| Lamar | city | Washington | United States | 46.29 | -118.50722 | 997 | 292 |
| Lambert | city | Washington | United States | 45.77972 | -122.68083 | 308 | 16887 |
| Lamberts Corner | city | Washington | United States | 47.00361 | -122.96444 | 144 | 21316 |
| Lamoine | city | Washington | United States | 47.72889 | -119.89722 | 2696 | 114 |
| Lamona | city | Washington | United States | 47.35944 | -118.48139 | 1998 | 126 |
| Lamont | city | Washington | United States | 47.20167 | -117.90417 | 1994 | 196 |
| Lancaster | city | Washington | United States | 47.03111 | -117.66333 | 1998 | 196 |
| Landsburg | city | Washington | United States | 47.375 | -121.97056 | 613 | 9112 |
| Langdon | city | Washington | United States | 46.02722 | -118.33806 | 925 | 27402 |
| Langley | city | Washington | United States | 48.04028 | -122.405 | 52 | 3990 |
| Lankner | city | Washington | United States | 46.91389 | -123.32083 | 200 | 403 |
| Larchmont | city | Washington | United States | 47.17 | -122.4325 | 387 | 136947 |
| Larimers Corner | city | Washington | United States | 47.89194 | -122.14333 | 180 | 46282 |
| Larson Mill | city | Washington | United States | 48.75583 | -122.41361 | 308 | 19059 |
| Latah | city | Washington | United States | 47.28167 | -117.15444 | 2598 | 333 |
| Latona | city | Washington | United States | 47.48333 | -122.3 | 387 | 122632 |
| Latona historical | city | Washington | United States | 47.655 | -122.32028 | 39 | 260574 |
| Lauderdale Junction | city | Washington | United States | 47.20306 | -120.70806 | 2329 | 209 |
| Lauer | city | Washington | United States | 47.22556 | -118.72806 | 1699 | 170 |
| Laurel | city | Washington | United States | 48.85528 | -122.48861 | 88 | 8517 |
| Laurel | city | Washington | United States | 45.94417 | -121.37889 | 1955 | 425 |
| Laurelhurst | city | Washington | United States | 47.66361 | -122.27583 | 157 | 153205 |
| Laurier | city | Washington | United States | 48.99889 | -118.22306 | 1587 | 177 |
| Lavender | city | Washington | United States | 47.20472 | -121.11111 | 2112 | 237 |
| Lavilla | city | Washington | United States | 47.69722 | -122.27389 | 3 | 151794 |
| Lavista | city | Washington | United States | 47.14306 | -117.705 | 1886 | 196 |
| Lawrence | city | Washington | United States | 48.85778 | -122.29222 | 177 | 4969 |
| Laws Corner | city | Washington | United States | 45.75389 | -121.42444 | 1971 | 1185 |
| Lawters Beach | city | Washington | United States | 47.65917 | -122.77694 | 209 | 8711 |
| Lawton subdivision | city | Washington | United States | 47.65556 | -122.39611 | 200 | 128803 |
| Lawtonwood subdivision | city | Washington | United States | 47.66917 | -122.41306 | 200 | 130602 |
| Le Grow | city | Washington | United States | 46.17333 | -118.83083 | 685 | 252 |
| Lea Hill | city | Washington | United States | 47.32639 | -122.18028 | 400 | 59107 |
| Leadpoint | city | Washington | United States | 48.90944 | -117.58639 | 2283 | 377 |
| Leahy | city | Washington | United States | 47.91917 | -119.38778 | 2112 | 285 |
| Leary | city | Washington | United States | 48.51194 | -122.48444 | 98 | 1968 |
| Leavenworth | city | Washington | United States | 47.59639 | -120.66028 | 1197 | 373 |
| Lebam | city | Washington | United States | 46.55917 | -123.54778 | 255 | 280 |
| Leber | city | Washington | United States | 46.94833 | -122.33 | 613 | 7122 |
| Lee | city | Washington | United States | 46.35528 | -118.555 | 1108 | 252 |
| Leland | city | Washington | United States | 47.89194 | -122.88528 | 262 | 343 |
| Lemolo | city | Washington | United States | 47.71194 | -122.62111 | 3 | 17542 |
| Lemolo | city | Washington | United States | 47.28833 | -121.80139 | 1584 | 507 |
| Leon | city | Washington | United States | 46.53194 | -117.03833 | 2598 | 1377 |
| Lester | city | Washington | United States | 47.20944 | -121.49278 | 1935 | 6 |
| Levering | city | Washington | United States | 46.78028 | -119.95667 | 547 | 400 |
| Levey | city | Washington | United States | 46.27583 | -118.84361 | 367 | 165 |
| Lewisville | city | Washington | United States | 45.81 | -122.52194 | 396 | 9663 |
| Lexington | city | Washington | United States | 46.1875 | -122.90417 | 200 | 27911 |
| Liberty | city | Washington | United States | 47.25389 | -120.66417 | 3113 | 266 |
| Liberty | city | Washington | United States | 46.35583 | -120.145 | 800 | 2388 |
| Liberty Lake | city | Washington | United States | 47.64833 | -117.09139 | 2050 | 11818 |
| Lichty | city | Washington | United States | 46.29278 | -119.95194 | 741 | 10352 |
| Lilliwaup | city | Washington | United States | 47.46361 | -123.11306 | 9 | 607 |
| Limestone Junction | city | Washington | United States | 48.95667 | -122.15583 | 547 | 283 |
| Lincoln | city | Washington | United States | 47.74417 | -122.61944 | 314 | 17542 |
| Lincoln | city | Washington | United States | 47.82917 | -118.41389 | 1512 | 121 |
| Lind | city | Washington | United States | 46.97222 | -118.61417 | 1397 | 75 |
| Lisabeula | city | Washington | United States | 47.4075 | -122.51639 | 196 | 9686 |
| Littell | city | Washington | United States | 46.63694 | -123.03417 | 200 | 5854 |
| Little Boston | city | Washington | United States | 47.8525 | -122.56889 | 144 | 6238 |
| Little Dalles historical | city | Washington | United States | 48.85417 | -117.86861 | 1797 | 378 |
| Little Elkhorn | city | Washington | United States | 45.7075 | -122.415 | 892 | 6309 |
| Little Falls | city | Washington | United States | 47.83028 | -117.91194 | 1624 | 239 |
| Little Hoquiam | city | Washington | United States | 47.32194 | -122.95917 | 200 | 2766 |
| Little Oklahoma | city | Washington | United States | 48.04389 | -123.30528 | 1095 | 3993 |
| Littlerock | city | Washington | United States | 46.90194 | -123.01667 | 193 | 4314 |
| Livingston | city | Washington | United States | 45.69 | -122.44389 | 387 | 10083 |
| Lochsloy | city | Washington | United States | 48.05167 | -122.03083 | 216 | 5744 |
| Locke | city | Washington | United States | 48.42667 | -117.31667 | 2080 | 201 |
| Lofall | city | Washington | United States | 47.81222 | -122.65694 | 209 | 6616 |
| Lona Beach | city | Washington | United States | 48.20444 | -122.44528 | 0 | 3179 |
| Lone Pine | city | Washington | United States | 47.9825 | -118.96194 | 1801 | 288 |
| Lone Pine | city | Washington | United States | 47.22278 | -117.14917 | 2598 | 253 |
| Long | city | Washington | United States | 46.29167 | -118.02556 | 1597 | 186 |
| Long Beach | city | Washington | United States | 46.3525 | -124.05306 | 29 | 3137 |
| Long Lake | city | Washington | United States | 47.83611 | -117.84778 | 1646 | 822 |
| Longbranch | city | Washington | United States | 47.20917 | -122.75556 | 98 | 3377 |
| Longmire | city | Washington | United States | 46.75 | -121.81139 | 3093 | 236 |
| Longview | city | Washington | United States | 46.13833 | -122.93694 | 157 | 51626 |
| Longview | city | Washington | United States | 45.92917 | -119.41222 | 298 | 1195 |
| Longview Heights | city | Washington | United States | 46.18056 | -122.95583 | 800 | 40660 |
| Longview Junction | city | Washington | United States | 46.10472 | -122.88694 | 173 | 25029 |
| Loomis | city | Washington | United States | 46.43639 | -124.04694 | 19 | 2170 |
| Loomis | city | Washington | United States | 48.82111 | -119.63222 | 1299 | 303 |
| Loon Lake | city | Washington | United States | 48.06167 | -117.63167 | 2398 | 637 |
| Loop Loop historical | city | Washington | United States | 48.45139 | -119.71222 | 3759 | 203 |
| Lopez | city | Washington | United States | 48.52389 | -122.91333 | 19 | 918 |
| Lost Creek | city | Washington | United States | 48.60944 | -117.3625 | 2007 | 154 |
| Loveland | city | Washington | United States | 47.06417 | -122.40778 | 403 | 30595 |
| Low Gap | city | Washington | United States | 46.98611 | -119.79056 | 1512 | 383 |
| Lowden | city | Washington | United States | 46.05639 | -118.58472 | 498 | 323 |
| Lowell | city | Washington | United States | 47.95583 | -122.19583 | 180 | 82773 |
| Lower Elwha | city | Washington | United States | 48.14444 | -123.55139 | 121 | 786 |
| Lowman Beach Park | city | Washington | United States | 47.54083 | -122.39472 | 272 | 92693 |
| Loyal Heights | city | Washington | United States | 47.68889 | -122.39167 | 200 | 130602 |
| Lucerne | city | Washington | United States | 47.64167 | -122.21944 | 200 | 77310 |
| Lucerne | city | Washington | United States | 48.2025 | -120.59 | 1584 | 61 |
| Lucia | city | Washington | United States | 45.83833 | -122.43333 | 600 | 2463 |
| Lummi | city | Washington | United States | 48.795 | -122.6125 | 19 | 7752 |
| Lummi Island | city | Washington | United States | 48.72472 | -122.685 | 0 | 1493 |
| Lyle | city | Washington | United States | 45.69611 | -121.285 | 200 | 1030 |
| Lyman | city | Washington | United States | 48.52722 | -122.06056 | 104 | 477 |
| Lynden | city | Washington | United States | 48.94667 | -122.45083 | 98 | 7636 |
| Lynnwood | city | Washington | United States | 47.82111 | -122.31389 | 400 | 154009 |
| Lynwood Center | city | Washington | United States | 47.60472 | -122.54611 | 78 | 33283 |
| Lyons | city | Washington | United States | 47.68056 | -117.57528 | 2299 | 3828 |
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