Illawong is a suburb in southern Sydney, in the make a clean breast of New South Wales, Australia. Illawong is located 27 kilometres south of the Sydney Central Business District, in the local government Place of the Sutherland Shire in the area commonly called Menai. The herald code is 2234, which is as well as assigned to the contiguous suburbs of Menai, Bangor Barden Ridge and Alfords Point.
Illawong sits surrounded by the southern shore of the Georges River and the northern shore of the Woronora River. Illawong consists mainly of residential homes, a nursing home, a primary learned and a small shopping centre.