|Port Hacking (Deeban)|
|An open youthful tide dominated, drowned valley estuary|
Looking inland over Port Hacking estuary towards the west from the Tasman Sea.
|Name origin: in honour of Henry Hacking, a pilot at Port Jackson|
|State||New South Wales|
|Region||Greater Metropolitan Sydney|
|- location||west of Yowie Bay|
|- location||Between Cronulla and Bundeena|
|Depth||9.1 m (30 ft)|
|Volume||105,261.5 m3 (3,717,275 cu ft)|
|Basin||165.3 km2 (64 sq mi)|
|Area||11.7 km2 (5 sq mi)|
|Website: NSW Environment and Heritage webpage|
Port Hacking (or Deeban), an open youthful tide dominated, drowned valley estuary, is located in southern Sydney, New South Wales, Australia approximately 30 kilometres (19 mi) south of Sydney central business district. Port Hacking has its source in the upper reaches of the Hacking River and several smaller creeks, including Bundeena Creek and The Basin and flows generally to the east before reaching its mouth, the Tasman Sea, south of Cronulla and north–east of Bundeena.
The total catchment area of Port Hacking is approximately 165 square kilometres (64 sq mi) and the area surrounding the estuary is generally managed by Sutherland Shire Council. While the area to the north of Port Hacking is urbanised, the area to the south is relatively pristine and forms the northern boundary of the Royal National Park.
The land adjacent to Port Hacking was occupied for many thousands of years by the Tharawal and Eora Aboriginal peoples and their associated clans. They used the bay as an important source of food and a place for trade.
Aboriginal history 
For more than 8000 years prior to 1840, the Tharawal (or Dharwal) people occupied the catchment area evidenced by hundreds of Aboriginal artefacts, middens, rock carvings and cave paintings. In the mid 19th century shell grit was in high demand as a source of lime for building in the Sydney district. Consequently, mud and oyster rocks were collected in large numbers from Port Hacking catchment destroying a number of aboriginal midden sites in the region.
European history 
Matthew Flinders and George Bass (with Bass's servant William Martin) explored there in early April 1796. They called it Port Hacking after Henry Hacking who was the principal game hunter in the colony and who first told them of a large river he had seen inland on kangaroo hunting expeditions. Hacking was the quartermaster on HMS Sirius, part of the First Fleet under the command of Governor Arthur Phillip. Hacking became a skilled, adventurous bushman, who led many hunting expeditions to supplement meat rations for Australia’s first settlers. He was amongst the party that found the lost government cattle at Cowpastures in 1795.
The northern headland, located at Cronulla is called Bass and Flinders Point.
Port Hacking effectively forms the southern boundary of Sydney's suburban sprawl. Working inland from the sea, the indented north bank of Port Hacking is formed by the suburbs of Cronulla, Woolooware, Burraneer, Caringbah, Dolans Bay, Port Hacking, Lilli Pilli, Yowie Bay, Miranda, Gymea Bay and Grays Point. The southern bank is largely undeveloped land within the Royal National Park, although the small communities of Bundeena and Maianbar are found there. Warumbul and Gundamaian are other localities on the southern bank, in the Royal National Park. Cronulla and National Park Ferry Cruises operates a regular passenger ferry service that crosses Port Hacking, connecting Cronulla and its railway station to Bundeena. They also operate cruises along Port Hacking that depart from Cronulla.
Port Hacking is a drowned river valley, with a water surface area of 11 km2. With very little industrial and no agricultural inputs, the water quality is categorised as 'extremely good', and the extensive inter-tidal shoals provide opportunity for wading birds.[dead link]
Port Hacking is a popular recreational area, where many activities can be enjoyed such as swimming, fishing and boating. The estuary and bays are used for watersports such as wakeboarding and water skiing and Scuba driving.
Port Hacking estuary near Burraneer
Port Hacking estuary near Warumbul
Port Hacking estuary at Grays Point
- "Port Hacking (Bay)". Geographical Names Register Extract. Geographical Names Board of New South Wales. 4 May 1973. Retrieved 8 January 2013.
- Roy, P. S; Williams, R. J; Jones, A. R; Yassini, I; et. al. (2001). "Structure and Function of South-east Australian Estuaries". Estuarine, Coastal and Shelf Science 53: 351–384.
- "Port Hacking". Geoscience Australia. Retrieved 7 July 2006.
- "Port Hacking Integrated Environmental Management Plan" (PDF). Sutherland Shire Council. 2008. p. 31. Retrieved 8 January 2012.
- Estensen, Miriam (2005). The Life of George Bass. Allen and Unwin. ISBN 1-74114-130-3.
- "Estuaries of New South Wales - Port Hacking". New South Wales Department of Infrastructure, Planning and Natural Resources. Retrieved 6 September 2005.[dead link]
- NSW Environment and Heritage webpage
- Port Hacking Integrated Environmental Management Plan (PDF) (2008). Sutherland Shire Council.