in what county is corvallis, or
Corvallis ( /kÉrvÃ¦lÉ¨s/) is a city located in central western Oregon, United States. It is the county seat of Benton County and the principal city of the Corvallis, Oregon Metropolitan Statistical Area, which encompasses all of Benton County. As of the 2010 United States Census, the population was 54,462. Corvallis is the location of Oregon State University. Joseph C. Avery settled a land claim at the mouth of Marys River where it flows into the Willamette River in 1845. In 1849, Avery opened a store at the site, platted the land, and surveyed a town site on his land claim, naming the community Marysville.