Explore Washington Washington Destinations & Activities Seattle Washington Facts Nickname: The Evergreen State Population: 7.1 million Capital: Olympia Entered Union: Nov. 11, 1889 (state #42) Washington Posts: 10 Best Things to Do in Seattle Fun fact: Seattle has an average rainfall of 38 inches per year. Washington DC has 43. Upon learning this fact A Week of Coffee for Coffee Lovers in Seattle I think everyone in the United States, and many people outside of the United States, probably are well aware that