The Unley electorate is situated south of the Adelaide CBD and parklands and is a largely residential area of approx. 12.2 km2. (the smallest seat geographically due to little open space and higher density of housing). Unley also has some of Adelaide’s grand old stone homes on large blocks. Protecting this element of it's character is a hotly debated topic. Strip shopping still exists on all main roads, and each road has an active traders association.

The Unley electorate is bounded by Cross Rd to the south, Greenhill Rd to the north, Goodwood Rd to the west and Portrush Road to the east. It abuts the electorates of Adelaide to the north, Waite to the south, Bragg to the East and Ashford to the West.

The electorate includes the suburbs of Eastwood, Frewville, Fullarton, Glenunga, Glen Osmond (western part) with in the city of Burnside and Goodwood (eastern part), Highgate, Hyde Park, Kings Park, Malvern, Millswood (eastern part), Myrtle Bank, Parkside, Unley, Unley Park and Wayville.(eastern part) with in the City of Unley.

The City Council of Unley is the electorate’s main council district (with a western section of Burnside City Council incorporating the in the east) and is bound by the City of Adelaide to the north, the City of Burnside to the east, the City of Mitcham to the south and the Cities of Marion and West Torrens to the west.