Arncliffe lies approximately eleven kilometres south of the Sydney central business district, within the Bayside Council area.
The suburb recorded a population of 12,023 in the 2021 Census, with residents living in 4,898 dwellings and an average household size of 2.68 persons.
About 44.8 per cent of people were born in Australia, while common overseas birthplaces included China (5.9 per cent), Lebanon (5.7 per cent), Mongolia (3.0 per cent) and North Macedonia (2.9 per cent).
Around 35.8 per cent of residents spoke only English at home, with Arabic (14.6 per cent), Mandarin (6.3 per cent), Macedonian (4.3 per cent) and Spanish (3.3 per cent) also spoken.
Employed residents used public transport (including train, bus or light rail) for commuting at about 10.4 per cent, while 36.4 per cent travelled by car as driver or passenger on census day.
Arncliffe railway station lies on the Illawarra line, approximately 8.42 km from Central Station, handling an average of 3,301 entries and exits daily in 2023.
Transit Systems bus routes 473, 420 and 420N operate through Arncliffe, linking to Rockdale, Campsie, Mascot, Sydney Airport and Burwood.
Major roads include the Princes Highway, Forest Road and Wollongong Road, while the M5 motorway has tunnel access beneath the suburb with Arncliffe entrances.
Commercial facilities cluster around Firth Street and Belmore Street near the station, extending along Forest Road and Wollongong Road and featuring shops, cafes, supermarkets and light industrial premises.
Educational institutions include Arncliffe Public School, Athelstane Public School, St Francis Xavier’s Catholic School and Al‑Zahra College within the suburb boundaries.
Medical services, general practitioners and allied health clinics cluster around the village centre and nearby Rockdale Town Centre, with St George Hospital a short trip away.
Parks such as Arncliffe Park, Cahill Park and Barton Park provide open green space, sports fields, playgrounds and a war memorial precinct.
The Arncliffe Youth Centre functions as a community hub offering multipurpose indoor courts, meeting rooms, support services and sporting activities. Recreation along the Cooks River corridor benefits walkers, rowers and the nearby golf facility at Kogarah Golf Club.