North St Marys
| North St Marys Sydney, New South Wales | |||||||||||||||
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Chifley College Dunheved Campus, North St Marys | |||||||||||||||
| Population | 4,123 (2021 census) | ||||||||||||||
| • Density | 1,304.7/km2 (3,379/sq mi) | ||||||||||||||
| Postcode(s) | 2760 | ||||||||||||||
| Elevation | 35 m (115 ft) | ||||||||||||||
| Area | 3.16 km2 (1.2 sq mi) | ||||||||||||||
| Location | 47 km (29 mi) west of Sydney CBD | ||||||||||||||
| LGA(s) | Penrith City Council | ||||||||||||||
| State electorate(s) | Londonderry | ||||||||||||||
| Federal division(s) | Lindsay | ||||||||||||||
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North St Marys is a suburb in western Sydney, in the state of New South Wales Australia. North St Marys is located 47 kilometres west of the Sydney central business district, in the local government area of the City of Penrith. North St Marys is an extension of the adjoining suburb of St Marys.