Moonta is a town on the Yorke Peninsula of South Australia, 165 km (103 mi) north-northwest of the state capital of Adelaide. It is one of three towns known as the Copper Coast or "Little Cornwall" for their shared copper mining history.
The centre is about 17 kilometres (11 mi) south west of Kadina, site of Wallaroo Mines, and 14 kilometres (8.7 mi) south of the port of Wallaroo. The name "Moonta" is reportedly derived from munta-muntara or moontera, an Aboriginal word for "thick scrub place" or "impenetrable scrub".
At the 2011 census, the Moonta township and the adjacent suburbs of Cross Roads and Yelta had a combined population of 681. The broader Moonta urban centre, also including Moonta Bay, North Moonta and Port Hughes, had a population of 3,659.
There are 11 suburbs surrounding central Moonta, each being a distinct historic locality or hamlet. These are: Cross Roads, East Moonta, Hamley, Kooroona, Moonta Bay, Moonta Mines, North Moonta, North Yelta, Paramatta, Port Hughes and Yelta.