Greenacres is a north eastern suburb of Adelaide, South Australia in the City of Port Adelaide Enfield. It is considered to be an inner suburb of greater Adelaide. Hampstead Road and Muller Road intersect at the south west corner of Greenacres making it a bustling area during rush hour. These form the western and southern boundaries of the suburb, with Fosters Road on the east and Redward Avenue on the northern boundary. Greenacres is home to the Greenacres Shopping Centre, which notably houses a Coles supermarket. 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. 2.2% identified themselves as Indigenous Australians. 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.^[3]