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. Just north of the town is the Waitaki River that forms the traditional border between the two regions, although the official border has now been moved south to put most of Waitaki District within Canterbury, including Duntroon. To the east of the village is the Maerewhenua River.