Ōnoyama Park, sports park in Naha, Japan

Ōnoyama Park is a 24.99-hectare sports park in Naha, Okinawa, opened in June 1959 as the prefecture's first athletic park. It contains a 400-metre, eight-lane track and field stadium with seating for about 9,000, a baseball ground, tennis courts, a budō hall, an archery range and a pool. The wide lawn in front of the stadium is bordered by trees and a small red-and-white striped structure.

Okinawa Prefecture opened the park in June 1959 as its first sports park, on 24.99 hectares in Ōnoyama-chō, Naha. The athletics stadium followed on 31 August 1970, with a 400 m eight-lane track and grass stands for about 9,000 people. Since 2006 a designated manager has run the facilities, and plans to rebuild the stadium as a football ground have been discussed since 2013.

Each October the park hosts the main venue of the Naha Festival and the Okinawa Industrial Festival, drawing crowds to the open field. The name Ōnoyama refers to the hill on which the grounds sit. The stadium, opened on 31 August 1970, seats about 9,000 on its grass stands and has hosted the Naha Marathon and the 1997 national radio calisthenics rally.

The park lies in Ōnoyama-chō, Naha, a 3-minute walk from Tsubogawa Station on the Okinawa Urban Monorail and 5 minutes from Ōnoyama Park Station; buses stop at Gunbashi-mae, about 5 minutes on foot. By car it is roughly 5 minutes from Naha Airport and 3 minutes from Naha Port. The grounds cover 24.99 ha and hold a track, baseball ground, tennis courts, budō hall, archery range and pool.

The park opened in June 1959 as Okinawa Prefecture's first athletic park, covering 24.99 hectares. Its stadium, opened on 31 August 1970, seats about 9,000 on grass stands and hosts the Naha Marathon and the Naha Festival each October. A J.League-standard football stadium has been planned for the site since 2013, with the start of use now targeted for fiscal 2031.