Eastern Washington is a region of the United States defined as that part of Washington state east of the Cascade Mountains. It is notable for, among other things:

• Central Washington University
• The Columbia River and the Grand Coulee Dam
• Eastern Washington University
• Gonzaga University
• Hanford Nuclear Reservation
• The Palouse: very fertile farmland; among its products are lentils and wheat
• Washington State University
• Whitman College
• The Yakima Valley: also very fertile farmland; amongs its products are apples, hops, wine grapes, pears, and cherries

Adams, Asotin, Benton, Chelan, Columbia, Douglas, Ferry, Franklin, Garfield, Grant, Kittitas, Klickitat, Lincoln, Okanogan, Pend Oreille, Spokane, Stevens, Walla Walla, Whitman, and Yakima Counties are in Eastern Washington.

Cities of note

• Clarkston
• Colfax
• Ellensburg
• Moses Lake
• Pullman
• Spokane
• Tri-Cities
• Walla Walla
• Wenatchee
• Yakima

Washington
Regions: Central Washington | Columbia River Plateau | Eastern Washington | Inland Empire | Kitsap Peninsula | Olympic Peninsula | Okanogan Country | Palouse | Puget Sound | San Juan Islands | Western Washington | Yakima Valley
Largest Cities: Auburn | Bellevue | Bellingham | Bremerton | Edmonds | Everett | Federal Way | Kennewick | Kent | Kirkland | Lakewood | Olympia | Redmond | Renton | Richland | Seattle | Shoreline | Spokane | Tacoma | Vancouver | Yakima
Counties: Adams | Asotin | Benton | Chelan | Clallam | Clark | Columbia | Cowlitz | Douglas | Ferry | Franklin | Garfield | Grant | Grays Harbor | Island | Jefferson | King | Kitsap | Kittitas | Klickitat | Lewis | Lincoln | Mason | Okanogan | Pacific | Pend Oreille | Pierce | San Juan | Skagit | Skamania | Snohomish | Spokane | Stevens | Thurston | Wahkiakum | Walla Walla | Whatcom | Whitman | Yakima