Oxford is a city in Butler County, Ohio, United States. The population was 23,035 at the 2020 census. A college town, Oxford was founded as a home for Miami University and lies in the southwestern portion of the state approximately 40 miles (64 km) northwest of Cincinnati and 40 miles (64 km) southwest of Dayton. In 2014, Oxford was rated by Forbes as the "Best College Town" in the United States, based on a high percentage of students per capita and part-time jobs, and a low occurrence of brain-drain. It is a part of the Cincinnati metropolitan area.