The Oregon Institute was an American school located in the Willamette Valley of the Oregon Country during the 19th century. Begun in 1842, it was the first school built for European Americans west of Missouri. Founded by members of the Methodist Mission, it was located in what is now Salem, Oregon. The school began as a pre-college institution, but by 1853 was developed as Willamette University. The school's three-story building was a prominent feature in the early days of Oregon; it served as a meeting place for the Oregon Territorial Legislature when it first moved to Salem.