Peakhurst Heights is a suburb in southern Sydney, in the state of New South Wales, Australia. Peakhurst Heights is located 22 kilometres south of the Sydney central business district and is part of the St George area. Peakhurst Heights is in the local government area of the Georges River Council. Peakhurst is a separate suburb to the north. Peakhurst Heights is bordered by Boggywell Creek and Lime Kiln Bay, on the Georges River. The shores of Lime Kiln Bay once had Aboriginal middens that were used by shell-gatherers.