Washington is a state in the Pacific Northwest region of the United States. It is north of Oregon, west of Idaho, east of the Pacific Ocean, and south of British Columbia. (British Columbia is part of Canada.) There are more than 6,000,000 people in Washington. Most live in the western part of Washington, which gets more rain. About a quarter of the people live in the east part, where it gets less rain, and some parts have a desert climate. The largest city on the east part is Spokane, and it is also the second biggest city in the state. The Cascade Mountains go down the middle of the state and break it into two sides. The state's nickname is the "Evergreen State" because it has a lot of pine trees. Washington was the 42nd state to join the United States, on November 11, 1889. It is often called "Washington State" so that it does not get confused with the nation's capital, Washington, D.C. The name "Washington" comes from President George Washington.