| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Stabler | city | Washington | United States | 45.81 | -121.91 | 1072 | |
| Staley | city | Washington | United States | 46.67 | -117.15 | 2598 | |
| Stampede | city | Washington | United States | 47.26 | -121.37 | 2814 | |
| Stanwood | city | Washington | United States | 48.24 | -122.37 | 9 | |
| Star Lake | city | Washington | United States | 47.36 | -122.29 | 400 | |
| Starbuck | city | Washington | United States | 46.52 | -118.13 | 830 | |
| Starr | city | Washington | United States | 48.00 | -119.88 | 830 | |
| Startup | city | Washington | United States | 47.87 | -121.74 | 200 | |
| State Camp | city | Washington | United States | 46.25 | -123.32 | 200 | |
| Stateline | city | Washington | United States | 46.00 | -118.41 | 830 | |
| Stayman | city | Washington | United States | 47.77 | -120.09 | 830 | |
| Steele Creek Mobile Home Park | city | Washington | United States | 47.64 | -122.63 | 200 | |
| Stehekin | city | Washington | United States | 48.31 | -120.66 | 1095 | |
| Steilacoom | city | Washington | United States | 47.17 | -122.60 | 252 | |
| Stella | city | Washington | United States | 46.19 | -123.12 | 200 | |
| Stentz Spring | city | Washington | United States | 46.23 | -117.58 | 5400 | |
| Steptoe | city | Washington | United States | 47.01 | -117.36 | 2509 | |
| Sterling | city | Washington | United States | 48.49 | -122.28 | 36 | |
| Steven's Street Mobile Home Park | city | Washington | United States | 48.27 | -117.72 | 1699 | |
| Stevens | city | Washington | United States | 47.63 | -122.31 | 282 | |
| Stevenson | city | Washington | United States | 45.70 | -121.88 | 196 | |
| Stillwater | city | Washington | United States | 47.68 | -121.92 | 98 | |
| Stimson | city | Washington | United States | 47.09 | -123.23 | 400 | |
| Stimson Crossing | city | Washington | United States | 48.12 | -122.18 | 85 | |
| Straight Point | city | Washington | United States | 45.70 | -121.40 | 200 | |
| Strandell | city | Washington | United States | 48.91 | -122.36 | 98 | |
| Stratford | city | Washington | United States | 47.43 | -119.28 | 1669 | |
| Striebels Corner | city | Washington | United States | 47.80 | -122.57 | 187 | |
| Stringtown | city | Washington | United States | 46.31 | -123.98 | 0 | |
| Stringtown | city | Washington | United States | 47.32 | -117.06 | 3349 | |
| Stuart | city | Washington | United States | 47.69 | -121.95 | 98 | |
| Stuck | city | Washington | United States | 47.28 | -122.23 | 200 |