Washington is a state in the Pacific Northwest region of the United States. The state was admitted to the union on November 11, 1889. It has a population of about 7 million people and is the 18th most populous state in the country. The capital of Washington is Olympia, and the largest city is Seattle. Washington is known for its beautiful landscape, with mountains and forests making up much of the terrain. The state also has a thriving economy, with major sectors including technology, agriculture, and tourism. Learn more about this amazing state with our guide to Washington forms.