Kadina ( kə-DEE-nə) is a town on the Yorke Peninsula of the Australian state of South Australia, approximately 144 kilometres north-northwest of the state capital of Adelaide. The largest town of the Peninsula, Kadina is one of the three Copper Triangle towns famous for their shared copper mining history. The three towns are known as “Little Cornwall” for the significant number of immigrants from Cornwall who worked at the mines in the late 19th century.

The Copper Coast Highway passes through Kadina. The town was formerly the Junction of the now disused Balaklava–Moonta railway line with the Kadina–Brinkworth line. Both of these lines closed to regular service in 1993, with the Wallaroo to Kadina section of former converted to a rail trail in 2009. Nearby Kadina Airport caters to small private aircraft and emergency services.