Oatley lies approximately 18 kilometres south of the Sydney central business district. It forms part of the Georges River Council within the St George region.
The suburb had a population of 10,664 at the 2021 census, residing in around 4,019 dwellings and averaging 2.76 persons per household.
People in Oatley display a diverse mix of ancestries, with English, Australian and Chinese among the most common.
Most residents were born in Australia (71.1 per cent), followed by persons born in China (6.6 per cent), England (2.6 per cent), Hong Kong (1.6 per cent), New Zealand (1.0 per cent) and North Macedonia (0.9 per cent).
Around 70.1 per cent spoke only English at home, with Mandarin (7.4 per cent), Cantonese (4.5 per cent), Greek (2.9 per cent), Croatian (1.7 per cent), and Macedonian (1.6 per cent) also represented.
Oatley railway station sits on the Illawarra line and serves the suburb with Sydney Trains T4 services. The station handled about 2,545 entries and exits daily in 2023.
Trains run roughly every 15 minutes, and the journey to the CBD takes approximately 29 to 32 minutes. Bus services also operate through the suburb with connections to nearby areas.
Oatley offers several schools, including Oatley Public School, Oatley West Public School, St Joseph’s Catholic School and Georges River College Oatley Senior Campus.
Oatley maintains a village‑style commercial precinct close to the station, featuring cafés, local shops and community services.
The suburb comprises several heritage landmarks such as the Oatley Clock Tower, the Oatley RSL & Community Club (formerly the Oatley Radio Theatre), and Myles Dunphy Bushland Reserve.
Recreational spaces abound, with Oatley Park covering about 45 hectares and offering bushland, lookouts, a swimming area, playground, barbecue facilities and a sports oval.
Additional green spaces include Oatley Pleasure Grounds, Renown Park, Lime Kiln Bay Bushland Sanctuary, Moore Reserve, Giriwa Picnic Ground and Webster's Lookout.
Water-based and sporting activities feature prominently, with local clubs supporting rugby, soccer, netball, and gymnastics using venues such as Renown Park and H.V. Evatt Park.