Oregon is a state in the Pacific Northwest of the United States. It is bordered on its west by the Pacific Ocean, north by Washington, south California, east Idaho, and southeast Nevada. The Columbia River delineates much of Oregon's northern boundary, the Snake River largely its eastern.
Oregon's area was inhabited by many indigenous tribes before traders, explorers, and settlers arrived. An autonomous government was formed in Oregon Country in 1843, Oregon Territory was created in 1848, and Oregon became the 33rd state on February 14, 1859.