Morphett Vale is a southern suburb of Adelaide, South Australia in the City of Onkaparinga. It is the largest suburb in the state, with a population of more than 23,000 and an area of 12.76 km2, followed by Paralowie with nearly 10,000 fewer residents. There are approximately 1,000 businesses in Morphett Vale. The suburb is bordered by Sheriffs/Pimpala Road, Panalatinga Road, Doctors/Beach Road, and the Southern Expressway.