- Waadah Island
- Waatch
- Wabash
- Wabash
- Wacota
- Wade Island
- Wagner
- Wagnersburg
- Wagon Wheel Mobile Home Park
- Wahkiacus
- Wahl
- Wahluke
- Waits
- Waitsburg
- Wakefield
- Waldon Island
- Waldron
- Waldron Island
- Walker
- Walkers Landing
- Walla Walla
- Walla Walla East
- Wallace River Mobile Home Park
- Waller
- Wallner
- Wallula
- Wallula Junction
- Walnut Grove
- Walnut Grove Mobile Home Park
- Walters