Illawong is a suburb in southern Sydney, in the permit 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 Place commonly called Menai. The make known code is 2234, which is plus assigned to the contiguous suburbs of Menai, Bangor Barden Ridge and Alfords Point.
Illawong sits in the midst of 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 college and a little shopping centre.