Oak Creek is a tributary, about 3.5 miles (5.6 km) long, of Marys River in Benton County in the U.S. state of Oregon.

The stream descends from forested hills north of Corvallis through the northwest part of the city and across the campus of Oregon State University.

It then flows southeast through the west side of the city and the Oregon State University campus to enter the river near Reser Stadium and Avery Park.

The mills likely involved artificial dams, which blocked fish passage, and holding ponds and at least one flume, and these altered the stream flow and temperature.

In 2013, the Greenbelt Land Trust bought the property, which consists of forest—including Oregon white oak on the higher ground—marshy savanna, braided stream channels and beaver ponds.

The Trust, a conservation group concerned with the mid-Willamette Valley,[8] is restoring damaged wildlife habitat while using the property for food production, hiking trails, and education.