The Gulf St Vincent Important Bird Area comprises land extending along the coast of Gulf St Vincent, north of Adelaide, South Australia.
The Gulf St Vincent Important Bird Area (IBA) is a 256 square kilometres (99 sq mi) strip of coastline containing the continuous mudflats along the north and north-east of Gulf St Vincent north of Adelaide. It extends from Ardrossan in the north-west, around the head of the Gulf to the mouth of the Port River and Outer Harbor in Adelaide. The main habitats are intertidal mudflats, mangroves and two large saltworks, with some small coastal wetlands.
Much of the IBA adjoins industrial and residential suburbs, especially to the north of Adelaide. Key sites include the Price saltworks, Clinton Conservation Park, Parham, Port Prime, the Dry Creek wetlands and saltworks, Salisbury wetlands, Barker Inlet wetlands, Bolivar Wastewater Treatment Plant, Buckland Park Lake, the Port River mouth, the Torrens Island complex, and Outer Harbor. Many birds move between the various sites and the area is treated as a single IBA.
The coast of Gulf St Vincent from Ardrossan to the Barker Inlet has been identified by BirdLife International as an Important Bird Area (IBA) because it supports over 1% of the world populations of black-faced cormorants, red-necked stints, sharp-tailed sandpipers, banded stilts, red-capped plovers, sooty and pied oystercatchers, and silver gulls. It also supports populations of Australasian bitterns and fairy terns.