Port Hacking is a small bayside suburb located on the north shore of the Port Hacking estuary in southern Sydney, in the state of New South Wales, Australia. The suburb is situated 26.7 kilometres south of the Sydney central business district in the local government area of the Sutherland Shire.

The suburb name is the same as the name of the adjacent estuary.

Thomas Holt (1811–88) owned most of the land that stretched from Sutherland to Cronulla, including land here. In 1840, parish maps also showed that 20 acres (81,000 m) of land on this point were owned by Francis Mitchell. In 1858, Mary and Andrew Webster paid 108 pounds and 15 shillings plus a yearly peppercorn quit rent for their land in this area. The Websters sold their land to Dominick Dolan in 1863.

Port Hacking is surrounded by the suburbs of Caringbah South to the north-west, Lilli Pilli to the south-west and Dolans Bay to the north-east. The suburbs of Maianbar and Bundeena are located on the opposite bank of Port Hacking.

Port Hacking is a residential suburb.

Shiprock Aquatic Reserve is within Burraneer Bay. Access to the aquatic reserve is via Shiprock Rd in Port Hacking.

Located on Port Hacking Road South, are a variety of specialty shops and professional services that service the surrounding suburbs of Port Hacking, Lilli Pilli, Dolans Bay and Caringbah South. These are a cellar, café, restaurant, butcher, florist, and reality agency, with many more small businesses. The strip of shops is most known for D'lish on Port, a café/restaurant.

According to the 2021 census, there were 1,210 residents in Port Hacking.

• 83.0% of people were born in Australia. The most common other countries of birth were England 3.8%, China 1.2%, Greece 0.9%, New Zealand 0.6% and Italy 0.5%.
• In Port Hacking, 86.9% of people only spoke English at home. Other languages spoken at home included Greek 2.6%, Mandarin 1.7%, Italian 1.2%, Cantonese 1.0% and Arabic 0.6%.
• The most common responses for religion in Port Hacking were Catholic 31.9%, No Religion 27.3%, Anglican 20.7%, Eastern Orthodox 5.2% and 3.1% did not state a religion.
• The average weekly household income in Port Hacking was $3,394, much higher in comparison to the New South Wales average of $1,829.

Port Hacking was the hosting ground for Australia's Next Top Model series 4 in 2008.

• Ian Thorpe - Olympic Swimmer, a former resident