| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Mead | city | Washington | United States | 47.77 | -117.35 | 1909 | |
| Meadow Glade | city | Washington | United States | 45.76 | -122.56 | 232 | |
| Meadow Ridge Mobile Home Park | city | Washington | United States | 47.43 | -120.34 | 830 | |
| Meadowbrook | city | Washington | United States | 47.71 | -122.29 | 193 | |
| Meadowbrook Mobile Home Park | city | Washington | United States | 47.17 | -122.03 | 830 | |
| Meadowdale | city | Washington | United States | 47.85 | -122.33 | 308 | |
| Meadowdale | city | Washington | United States | 47.63 | -122.63 | 328 | |
| Meadowdale Mobile Home Park | city | Washington | United States | 47.84 | -122.30 | 830 | |
| Medical Lake | city | Washington | United States | 47.57 | -117.68 | 2509 | |
| Medina | city | Washington | United States | 47.62 | -122.23 | 164 | |
| Medo Lynn Mobile Home Park | city | Washington | United States | 47.81 | -122.32 | 400 | |
| Meeker | city | Washington | United States | 47.19 | -122.28 | 98 | |
| Megler | city | Washington | United States | 46.25 | -123.86 | 0 | |
| Melbourne | city | Washington | United States | 46.95 | -123.63 | 400 | |
| Menlo | city | Washington | United States | 46.62 | -123.65 | 200 | |
| Menoken | city | Washington | United States | 46.30 | -118.16 | 1669 | |
| Mentor | city | Washington | United States | 46.46 | -117.47 | 2509 | |
| Mercer Heights | city | Washington | United States | 47.57 | -122.23 | 118 | |
| Mercer Island | city | Washington | United States | 47.57 | -122.22 | 200 | |
| Mercer Island Town | city | Washington | United States | 47.58 | -122.24 | 200 | |
| Meredith | city | Washington | United States | 47.35 | -122.24 | 108 | |
| Meridian | city | Washington | United States | 47.67 | -122.33 | 200 | |
| Meridian | city | Washington | United States | 47.21 | -122.72 | 98 | |
| Meridian Heights | city | Washington | United States | 47.38 | -122.12 | 830 | |
| Meridian Mobile Estates | city | Washington | United States | 47.17 | -122.29 | 830 | |
| Meridian Terrace Mobile Manor | city | Washington | United States | 47.08 | -122.30 | 830 | |
| Meridian Village Mobile Home | city | Washington | United States | 47.89 | -122.24 | 830 | |
| Merritt | city | Washington | United States | 47.78 | -120.84 | 2509 | |
| Mesa | city | Washington | United States | 46.58 | -119.01 | 830 | |
| Meskill | city | Washington | United States | 46.64 | -123.17 | 400 | |
| Metaline | city | Washington | United States | 48.85 | -117.39 | 2001 | |
| Metaline Falls | city | Washington | United States | 48.86 | -117.37 | 2004 | |
| Meteor | city | Washington | United States | 48.27 | -118.28 | 1998 | |
| Methow | city | Washington | United States | 48.13 | -120.00 | 1669 | |
| Metum | city | Washington | United States | 47.69 | -122.40 | 200 |