High Quality Content by WIKIPEDIA articles! Allawah is a suburb in southern Sydney, in the state of New South Wales, Australia. Allawah is located 16 kilometres south of the Sydney central business district and is part of the St George area. Allawah lies mostly in the local government area of the Municipality of Kogarah and partly in the City of Rockdale. The postcode is 2218, which is shared by the neighbouring suburb of Carlton.