Hayward Field is a historic track and field stadium in the Pacific Northwest located on the University of Oregon campus in Eugene, Oregon. Nearly 100 years in age, it has been the home of the university's track and field teams since 1921, and was the on-campus home of the varsity football team from 1919-1966.

Hayward Field was named after track coach Bill Hayward (1868–1947), who ran the Ducks' program from 1904 to 1947.

Renovated in 2004, it is one of only five International Association of Athletics Federations Class 1 certified tracks in the United States. The elevation of Hayward Field is approximately 420 feet (130 m) above sea level and its infield has a conventional north-south orientation.

In 2018, the stadium was demolished and will be rebuilt on the same site. Expected to reopen in 2020, the new stadium is financed by U of O's philanthropic community, with alumnus Phil Knight as the main donor.