Port Paterson is a locality in the Australian state of South Australia located on the east coast of Spencer Gulf at the gulf's northern end about 237.4 kilometres (147.5 miles) north of the state capital of Adelaide and about 9 kilometres (5.6 miles) south of the centre of Port Augusta. Port Paterson is located within the federal division of Grey, the state electoral district of Stuart and the local government area of the City of Port Augusta.