The suburb also features Hampstead Barracks, a small suburban Australian Army base.

According to the Australian Bureau of Statistics, at the 2021 census the suburb had a population of 3,356, split evenly between males and females.

Approximately 48.7% of Greenacres' residents were born overseas, of whom the largest percentage were born in India followed by China, England, Nepal and Sri Lanka.

The majority of the population were employed in professional jobs, community and personal services, administration or labouring.

Approximately 29.5% of Greenacres' population identify as non-religious, 22% practice Hinduism and 15.4% are Catholic.