Greendale is a suburb of Sydney, in the state of New South Wales, Australia.

Greendale was originally home to the Mulgoa tribe of the Darug people.

[2] The first British explorer to visit the area was botanist George Caley in 1800.

A number of land grants were made in the area in 1811, one of which was to a Mary Birch who named her property Greendale.

Bents Basin, a recreational area on the Nepean River at Greendale is named after him.