History of Washington (state) result, the law went into effect on June 7, 2006. The Washington legislature introduced more advanced converge of domestic partnerships in 2008. History of Washington (state) The history of Washington includes thousands of years of Native American history before Europeans and Americans arrived and began to establish territorial claims. The region was part of Oregon Territory from 1848 to 1853, after which it was separated from Oregon and established as Washington Territory. In 1889, Washington became the 42nd state of the United States. Archaeological evidence shows that the Pacific Northwest was one of the first populated areas in North America.
Washington (state) support. Washington, D. C.'s, own statehood movement in the 21st century includes a proposal to use the name "State of Washington, Douglass Commonwealth", which would conflict with the current state of Washington. Residents of Washington (known as "Washingtonians") and the Pacific Northwest simply refer to the state as "Washington," and the nation's capital "Washington, D. C.," "the other Washington," or simply "D. C.". Washington is the northwestern-most state of the contiguous United States. It borders Idaho to the east, bounded mostly by the meridian running north from the confluence of the Snake River and Clearwater River (about 116°57' west), except