Mortdale lies about 20 kilometres south of the Sydney central business district and belongs to the St George region under the Georges River Council. The suburb spans roughly 2.9 square kilometres and features 17 parks, which account for nearly 22.5 per cent of its area.
By the 2021 Census, its population stood at 10,745, reflecting a modest growth of approximately 3.1 per cent since 2016. The predominant age group in Mortdale fell within the 30–39 years bracket.
Households mainly consist of couples with children, many of whom paid between AUD 1,800 and 2,399 per month in mortgage repayments. The owner-occupation rate in 2021 reached 61.1 per cent, slightly lower than the 62.4 per cent recorded in 2016. Median house prices registered at around AUD 1,680,000, while units averaged AUD 760,000.
Quarterly price growth for houses reached around 1.54 per cent, with units remaining stable, and annual growth over the past year was approximately 4.84 per cent for houses and 1.84 per cent for units.
Rental yields averaged about 2.63 per cent for houses and 4.23 per cent for units, with median weekly rent at approximately AUD 780 for houses and AUD 600 for units.
Mortdale railway station rests on the Illawarra Line (T4 Eastern Suburbs & Illawarra services) approximately 17 kilometres from Central Station. The station serves around 4,535 passenger movements daily (annual entries and exits averaging 1,655,300 in 2023).
Trains to the Sydney CBD typically take about 30 to 37 minutes, running every 10 to 15 minutes during peak periods. Multiple bus routes, including services to Bankstown and Hurstville, serve the station precinct, along with a NightRide route N10.
Mortdale Memorial Park, notable for its war memorial and rotunda, receives local attention for events such as ANZAC Day services, carols and wedding ceremonies.
Moore Reserve lies nearby, offering scenic views across Oatley Bay, picnic and barbecue areas, children’s play equipment, fitness installations, a walking path, and waterfront access, including a boat ramp.
Mortdale’s main shopping strip along Morts Road has a village atmosphere with a mix of butchers, bakers, cafés, a supermarket, health practitioners, banks, vets and a pub.
The suburb also includes a significant railway maintenance facility, the Mortdale Maintenance Depot, which services T‑set trains for the T4 line and has operated since 1925.