Western Washington is a region of the United States defined as the area of Washington state west of the Cascade Mountains. This region is home to the state’s largest city, Seattle, the state capital, Olympia, and the majority of the state’s residents. The climate is generally far more damp and temperate than that of Eastern Washington.
As of the 2010 census, Western Washington was home to 5,229,486 of the state’s total 6,724,540 residents, making its population comparable to that of Minnesota. The region has a land area of 24,742 square miles, for a population density of 211.36 people per square mile.