Glenhaven is a semi rural suburb of Sydney, in the state of New South Wales, Australia 32 kilometres north-west of the Sydney central business district in the local government area of The Hills Shire, part of the Hills District.

[3] Glenhaven is on the route of the Great North Road that linked Parramatta with the Hunter Valley.

The area had many wild flowers, including waratahs, Christmas bush, boronias, native roses, and a variety of orchids which thrived there.

On the east side of Old Northern Road semi-rural acreages are present, as well as a retirement village and the Flower Power Garden Centre.

Since half the suburb is located on a ridge 180-200m high, the higher terrain homes have picturesque panoramas of the Blue Mountains looking out to the west.