* Puget Sound: This region includes the Seattle metropolitan area and Everett, Tacoma and Olympia. It is the most populous region in the state and is home to a diverse economy, including technology, aerospace, international trade, and healthcare.
* Greater Spokane Area: This region includes the city of Spokane and the surrounding area, and serves as a major regional commercial and cultural hub for the Inland Northwest. It is also a hub of education and research, with several colleges and universities located in the area.
* South Sound: This region includes the cities of Olympia and Lacey and is known for its natural beauty, including the Puget Sound and the Olympic Mountains. It is also a major center of state government and is home to several military installations.
* North-Central Washington: This region includes the cities of Wenatchee and Yakima, and is known for its agricultural production, including apples, pears, cherries and grapes. It is also home to several national parks and recreation areas, including North Cascades National Park and Lake Chelan National Recreation Area.
* Eastern Washington: This region includes the cities of Spokane, Tri-Cities, and Walla Walla, and is known for its diverse geography, including mountains, deserts and forests. It is also home to several Native American tribes and reservations.
* Olympic Peninsula: This region includes the Olympic Mountains and is known for its rugged natural beauty, including rainforests, beaches, and mountains. It is also home to several national parks and recreation areas, including Olympic National Park and the Olympic National Forest.
The perceptual regions of Washington state are:
* Western Washington: This region generally includes the Puget Sound region, the South Sound region, and the Olympic Peninsula. It is known for its mild climate, lush green landscapes, and proximity to the Pacific Ocean.
* Eastern Washington: This region includes the North-Central Washington region and the Eastern Washington region, and is known for its drier climate, desert landscapes, and the Cascade Mountains.