State Demographics: Washington is a state in the Pacific Northwest region of the United States. Washington was carved out of the western part of Washington Territory which had been ceded by Britain in 1846 by the Oregon Treaty as settlement of the Oregon Boundary Dispute. It was admitted to the Union as the forty-second state in 1889. The United States Census Bureau estimated the state's population was 6,664,195 as of 2009. Washington was named after George Washington, the first President of the United States, and is the only U.S. state named after a president. According to the U.S. Census, as of 2009, Washington has an estimated population of 6,664,195, which is an increase of 770,074, or 13.1%, since the year 2000. This includes a natural increase of 221,958 people (that is, 503,819 births minus 281,861 deaths) and an increase from net migration of 287,759 people into the state. If you are relocating to Vermont, please use our directory to help you find a qualified advisor for your category of interest. If you are relocating to Washington, please use our directory to help you find a qualified advisor for your category of interest.