| Cumberland New South Wales | |||||||||||||||
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 Location in New South Wales | |||||||||||||||
| Established | 4 June 1788 | ||||||||||||||
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Cumberland County is a county in the State of New South Wales, Australia. Most of the Sydney metropolitan area is located within the County of Cumberland.
The County of Cumberland stretches from Broken Bay to the north, the Hawkesbury River to the north-west, the Nepean River to the west, the Cataract River to the south-west and the northern suburbs of Wollongong to the south. It includes the area of the Cumberland Plain.