McLaren Flat (35°12′S 138°35′E) is a township in the McLaren Vale/Willunga basin south of Adelaide. McLaren Flat is on the sprawling flat land to the east of the town of McLaren Vale on the road to Kangarilla. At the 2006 census, McLaren Flat had a population of 642.
McLaren Flat is part of the McLaren Vale wine region. The area surrounding the town is planted to vineyards and several wineries are located in the immediate area. It has a population of 600. It shares the same post code as McLaren Vale (5171) but has a different telephone exchange (8383...). McLaren Flat has its own primary school, however all of the town's sports teams are joined with the neighbouring town of McLaren Vale and known as McLaren Districts.
McLaren Flat is in the City of Onkaparinga. It is partly in both the state electorates of Heysen and Mawson . It is also on the boundary of the federal electorates of Kingston and Mayo .