Fisher is a locality in the Australian state of South Australia located about 96 kilometres (60 mi) north-east of the state capital of Adelaide and about 47 kilometres (29 mi) north-east of the municipal seat in Mannum.

[1] Fisher consists of land in the northern part of the cadastral unit of the Hundred of Fisher with a smaller portion extending to the north into the hundred of Skurray.

The portion within the Hundred of Fisher is bounded to the north and to the west by the boundaries of the hundred, to the south by the Stott Highway and to the east in two parts - the centre-line of the channel of the Murray River in the north and the Murraylands Road in the south.

[7] Land in its north-east corner, i.e. sections 196 and 197 in the Hundred of Fisher, forms part of the private protected area known as the Yookamurra Sanctuary.

[8][9] Fisher is located within the federal division of Barker, the state electoral district of Chaffey and the local government area of the Mid Murray Council.