Glenthorne National Park–Ityamaiitpinna Yarta is a South Australian national park in the southern Adelaide suburb of O'Halloran Hill, 16 km (9.9 mi) south of the city centre.
The park opened to the public in November 2020, and as of 2021 O'Halloran Hill Recreation Park is in the process of transitioning to become part of it. It includes the nearby Glenthorne Estate, and will connect with other parks and parcels of land in Adelaide's south to form the Glenthorne Precinct. These include Hallett Cove Conservation Park, Marino Conservation Park, areas of the Field River Valley and the Happy Valley Reservoir.