Carss Park lies approximately 17 kilometres south of the Sydney central business district within the Georges River Council area and forms part of the St George region.
The suburb recorded a population of 1,265 in the 2021 census, showing slight growth from 1,252 in 2016 and covering about 0.9 square kilometres.
The median age in 2016 was 45 years, with the predominant age group including adolescents aged 10–19 years.
Seventy‑one per cent of residents were born in Australia, and 61.8 per cent spoke only English at home, while Greek was the most common other language, spoken by 13 per cent.
The most commonly reported religions were Catholic (25.6 per cent), Orthodox (22.4 per cent) and No Religion (21.7 per cent).
Households are characterised by a high level of owner-occupation (79.3 per cent in 2021) and are predominantly composed of couples with children.
Separate houses dominate the housing mix, and the area includes Environmental Living and Low-Density Residential zones alongside Recreational Waterways uses.
Median monthly mortgage repayments were around $2 913, with weekly rents near $212 and an average household size of about 3.3 people.
Most commuting is conducted by private vehicle, with 34.3 per cent driving to work and only 3.3 per cent using public transport, while 44.2 per cent worked from home on census day.
Local heritage includes Carss Cottage, a mid‐19th‑century sandstone home built by William Carss and now listed on the State Heritage Register.
Recreationally, Carss Bush Park spans approximately 50 acres and features bushland, sports fields, picnic and playground areas, a café, a swimming pool, and the heritage-listed cottage within its grounds.