Westleigh is a residential suburb located approximately 22 kilometres north-west of Sydney's central business district, within the Hornsby Shire local government area. The suburb is characterised by its leafy environment and proximity to natural bushland reserves.
As per the 2021 Census, Westleigh had a population of 4,501 residents. The demographic profile indicates that 65.0% of the population was born in Australia, with significant communities originating from England (5.6%), China (4.8%), India (2.8%), South Africa (2.3%), and Hong Kong (1.5%). Languages spoken at home include English (75.8%), Mandarin (6.4%), Cantonese (2.5%), Hindi (1.5%), Arabic (1.4%), and Korean (1.4%). The median age was 45 years, which is above the national median of 38 years.
Bus services operated by CDC NSW facilitate public transportation in Westleigh, connecting the suburb to nearby Normanhurst and Hornsby railway stations on the Sydney Trains Northern Line. These services provide residents with access to the Sydney CBD and other areas.
Essential establishments in the suburb include the Westleigh Village Shopping Centre, which features supermarkets such as Aldi and Mint-Fresh IGA, as well as a butcher, chemist, baker, and other specialty stores. The shopping centre has undergone significant renovations since 2016.
Recreational activities are supported by various parks and facilities. Oakleigh Oval serves as the home ground for the Thornleigh Baseball Club and Thornleigh Thunder Football Club. Ruddock Park offers play equipment, public toilets, barbecue facilities, and tennis courts available for hire. A fenced off-leash dog park sits between Ruddock Park and the shopping centre. In 2016, the Hornsby Shire Council purchased 34 hectares of land from Sydney Water in Westleigh, with the intention of using this land as public open space for recreation.
The housing landscape in Westleigh predominantly consists of separate houses. The suburb is divided by Quarter Sessions Road, with the southern side developed earlier and containing most public amenities, while the northern side, subdivided in 1974, features newer residential developments.