O'Halloran Hill, South Australia
| O'Halloran Hill Adelaide, South Australia | |||||||||||||||
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| Coordinates | 35°03′50″S 138°33′11″E / 35.064°S 138.553°E | ||||||||||||||
| Population | 2,722 (SAL 2021) | ||||||||||||||
| Established | 1838 | ||||||||||||||
| Postcode(s) | 5158 | ||||||||||||||
| Location | 18 km (11 mi) from City-centre | ||||||||||||||
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| Region | Southern Adelaide | ||||||||||||||
| County | Adelaide | ||||||||||||||
| State electorate(s) | Mitchell, Davenport, Fisher | ||||||||||||||
| Federal division(s) | Boothby, Kingston | ||||||||||||||
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O'Halloran Hill is a suburb in the south of Adelaide, South Australia, situated on the hills south of the O'Halloran Hill Escarpment, which rises from the Adelaide Plains and located 18 km from the city centre via the Main South Road. The suburb is split between the Cities of Marion and Onkaparinga, and it neighbours Happy Valley, Hallett Cove, Trott Park and Darlington. It includes a large area of former farmland and commercial vineyards known as the Glenthorne Estate, which in 2018 became the Glenthorne National Park–Ityamaiitpinna Yarta.