Fitzroy is an inner northern suburb of Adelaide 4 km (2.5 mi) from the Adelaide city centre, in the state of South Australia, within the City of Prospect. It ranks among the most expensive suburban areas in South Australia. It is adjacent to Prospect, Ovingham, Thorngate and, across the Adelaide Park Lands, North Adelaide.

The main north–south arterial traffic routes of Churchill Road and Prospect Road pass to the west and east of Fitzroy, and the City Ring Route passes along the southern edge of the suburb. Prospect Road is served by the G10 bus service and Churchill Road by the 235 bus service. The Ovingham railway station to the west is within easy walking distance of all parts of Fitzroy.