Peakhurst is a suburb in Southern Sydney, or the St George Area, in the state of New South Wales, Australia 21 kilometres south of the Sydney central business district. Peakhurst is in the local government area of the Georges River Council.
Peakhurst has a western border on Salt Pan Creek, on the Georges River. Peakhurst Heights is a separate suburb to the south, which is bordered by Boggywell Creek and Lime Kiln Bay, on the Georges River. Peakhurst Heights is sometimes still considered to be part of 'Peakhurst' by some residents of the area.