Duntroon (from Scottish Gaelic: Dùn Treòin) is a small farming-town in the Waitaki District of New Zealand's South Island.

Although traditionally considered a North Otago town, it is located within the farthest southern reaches of Canterbury.

Economic activity has been mainly agricultural for much of the town's history, focusing primarily on sheep farming and on the growing of crops such as wheat and barley.

5 kilometres (3 mi) south of Duntroon, in the Maerewhenua Valley, a group of large rock-formations called "Elephant Rocks" was used as a filming location for the first Chronicles of Narnia movie in 2005.

Near the station building, an old water tank for steam locomotives still stands in good condition.

Duntroon is on the route of the Alps to Ocean Cycle Trail, which was constructed from 2011 after approval in 2010.