Oak Park and River Forest High School (OPRF) is a public four-year high school located in Oak Park, a suburb of Chicago, Illinois, in the United States. It is the only school in Oak Park and River Forest District 200.

Oak Park is a village in Cook County, Illinois, adjacent to Chicago. It is the 26th-most populous municipality in Illinois, with a population of 54,583 as of the 2020 census. Oak Park was first settled in 1835 and later incorporated in 1902, when it separated from Cicero. It is closely tied to the smaller town of River Forest.