The Washington Territory was an organized territory of the United States from 1853 until 1889. It was created to provide a government for the region that is now the states of Washington, Oregon, and parts of Idaho. The territory was established to manage the growing population and economic development in the Pacific Northwest. In 1889, the Washington Territory became the state of Washington after a series of events, including the influx of settlers and the establishment of infrastructure. The transition marked a significant change in governance and allowed for greater representation and resources for the residents of the area.