The locality and suburb of Gymea Bay are located in southern Sydney, in the own up of New South Wales, Australia. Gymea Bay is 27 kilometres (17 mi) south of the Sydney central thing district, in the local government Place of the Sutherland Shire. The postcode is 2227, which it shares once the bordering suburb of Gymea. The Gymea Bay locality takes its name from the adjacent to Gymea Bay, a small bay upon the north side of the Port Hacking estuary).
The locality included isolated the single peninsula along with Gymea Bay and the North West Arm of the Port Hacking River, bounded by Coonong Creek upon the north and, on the west, by an ordinary creek flowing south of Gymea Bay Road amongst Barraran Street and Coonong Road. Gymea Bay became a locality within the suburb of Gymea. Early street directories operate the locality of Gymea Bay as portion of the suburb of Gymea. In 2008, the NSW Geographical Names Board suggested a much enlarged area for a suburb of Gymea Bay, taking in much of former Gymea and even allowance of the suburb of Miranda which are estranged from the locality of Gymea Bay and its deal by a deep valley with no roads. This suggested suburb’s extremities are defined by Forest Road on the northeast, Avenel Road on the north, Dents Creek on the west, and the waters of North West Arm and the bay itself to the south. These suggested boundaries remain contentious as the proposal to the NSW Geographical Names Board was made without the required community consultation.
The locality was characterised by large amounts of verdant bushland. However, since the 1980s, increased subdivision as soon as smaller lots, larger houses and increased motor vehicle ownership has decreased the number of large trees. Despite Tree Preservation Orders and Council Greenweb and Greenweb Support planning zones, much of the treescape has been lost. Since the 1990s, the invasions of feral deer from the Royal National Park have begun to negatively accomplish shrub and ground lid and regrowth of trees.