Allawah is a suburb in southern Sydney, in the state of New South Wales, Australia. Allawah is 16 kilometres south of the Sydney central business district and is part of the St George area. Allawah lies in the local government area of the Georges River Council. The postcode is 2218, which is shared by the neighbouring suburb of Carlton.

According to the 2016 census of Population, there were 5,706 residents in Allawah. 34.7% of people were born in Australia. The next most common countries of birth were China 21.7%, Nepal 6.9%, Philippines 2.9%, Hong Kong 2.8% and India 2.5%. 27.1% of people only spoke English at home. Other languages spoken at home included Mandarin 18.7%, Cantonese 11.6%, Nepali 7.1%, Arabic 3.7% and Macedonian 2.6%. The most common responses for religious affiliation were No Religion 31.6%, Catholic 17.0% and Hinduism 9.0%.

Allawah railway station is on the Illawarra line serviced by Sydney Trains. The railway station has had an upgrade in recent years, including the installation of lifts to benefit the mobility challenged. Trains to Bondi Junction and to Hurstville stop at Allawah six times an hour during peak times, and 4 times an hour at all other times except weekends. Weekends run 2 train services an hour in both directions. Allawah is approximately a 25 minute commute to the CBD via public transport.