Balclutha is a town in South Otago, lying towards the end of the Clutha River, on the east coast of the South Island of New Zealand. It is about halfway between Dunedin and Gore on the Main South Line railway, State Highway 1 and the Southern Scenic Route. Balclutha has a population of 4,340, and is the largest town in South Otago.

South Otago lies in the south east of the South Island of New Zealand. As the name suggests, it forms the southernmost part of the geographical region of Otago.