Oregon Territory Oregon Territory The Territory of Oregon was an organized incorporated territory of the United States that existed from August 14, 1848, until February 14, 1859, when the southwestern portion of the territory was admitted to the Union as the State of Oregon. Originally claimed by several countries (see Oregon Country), the region was divided between the UK and US in 1846. When established, the territory encompassed an area that included the current states of Oregon, Washington, and Idaho, as well as parts of Wyoming and Montana. The capital of the territory was first Oregon City, then Salem, followed briefly by
Oregon State University the state of Oregon. The main campus is located in Corvallis, in the Willamette Valley. In 1994, OSU was rated the safest campus in the Pac-10 in a study of universities. In September 2008, much of the Oregon State University campus in Corvallis was designated the Oregon State University Historic District by the National Register of Historic Places. It is the only college or university campus in Oregon to have a historic district designation. The effort to have the John Charles Olmsted-designed campus listed on the National Register took two years. OSU recently completed the construction of a branch campus