Sylvania lies approximately 22 kilometres south of the Sydney central business district. It belongs to the Sutherland Shire local government area and occupies a southern Sydney location.
At the 2021 census, Sylvania recorded a population of 10,749 residents. Around 71.9 per cent of residents were born in Australia, followed by smaller proportions born in China, England, Greece, New Zealand and Egypt.
English only was spoken at home by approximately 70.8 per cent of residents, with Greek (6.6 per cent), Mandarin (3.5 per cent), Arabic (2.4 per cent), Cantonese (2.4 per cent), and Macedonian (1.5 per cent) also represented.
The most common religious affiliations included Catholic (26.2 per cent), No Religion (25.8 per cent), Anglican (14.2 per cent) and Orthodox (13.7 per cent).
The suburb consists mainly of residential areas interspersed with native bushland and mixed commercial developments along Princes Highway and Port Hacking Road.
Sylvania Heights, as part of the suburb’s western area, contains its shopping precinct.
Southgate Shopping Centre, located at the corner of Princes Highway and Port Hacking Road, adjoins The Crest Hotel and a McDonald’s restaurant.
Additional retail and dining options line Princes Highway near the base of Tom Uglys Bridge and within Sylvania Heights Plaza.
The suburb includes three primary schools—Sylvania Public School, Sylvania Heights Public School, and Sylvania High School.
The Princes Highway crosses the Georges River via Tom Uglys Bridge and connects Sylvania north to Blakehurst and the St George area.
Public transport relies on buses operated by U-Go Mobility, serving routes along the Princes Highway corridor.
Residents travel to Sydney CBD via a combination of bus and train, taking around 52 minutes from Sylvania to the CBD, including transfers through nearby hubs such as Hurstville.
Sylvania displays a balance of green spaces, waterway frontage and built form without heavy reliance on rail links.