Monarto South is a locality in South Australia 16 kilometres south east by road from Adelaide.
In the late 1970s Monarto Junction (or "New Murray Town") was proposed to be the site of a new satellite city of Adelaide. By the turn of the century the proposal had been completely abandoned.
Transport
Monarto South is adjacent to the main Adelaide to Wolseley line, with Monarto South station formerly a junction for the Sedan branch line running north on the plain between the Murray River and the Mount Lofty Ranges.
In the 2010s, a local government project to upgrade Ferries McDonald Road commenced in Monarto South which included bitumization of the road. Due to the presence of mallee fowl in the vicinity the project had to go through several iterations to ensure that the environmental impact is minimized. Completion of the project would create a heavy transport link from Langhorne Creek to the Barossa Valley.