Mount Lewis lies about 18 kilometres south‑west of the Sydney central business district and falls under the City of Canterbury‑Bankstown local government area.
The suburb uses postcode 2190 and stands at around 60 metres above sea level. The 2021 Census recorded 1,234 residents, showing modest growth since about 1,195 in 2016.
The median age approaches 35 years, which reflects a relatively young adult population compared with the wider New South Wales.
Most households feature about 3.3 persons and average incomes of $1,539 weekly.
Owner‑occupied dwellings account for roughly two-thirds of homes, typically occupied by couple‑family households with children.
Residents born overseas form a significant share, with Lebanese, Australian and English ancestries among the most prevalent.
Arabic appears widely alongside English and Greek as an everyday language at home.
Travel to work data shows about 41.6 per cent drive as a driver, and roughly 2 per cent use train services, while around 30 per cent work from home.
Public transport use remains low overall at around 3.2 per cent across modes.
Bus routes link Mount Lewis with Bankstown and surrounding suburbs, and residents often access Bankstown train station, a short drive or ride away.
Wattle Street hosts a handful of shops and services, with a local infants' school located on Noble Avenue within the suburb limits.
Residents rely on neighbouring Bankstown and Greenacre for broader retail, medical and educational services, including primary and secondary schools, supermarkets and healthcare facilities.
Local reserves such as Mount Lewis Reserve offer green space, walking paths and vantage points across the west and east Sydney skyline views.
The Mount Lewis Bowling Club on Waterloo Road and nearby sportsgrounds support recreational activities for residents from adjoining suburbs.