Duntroon 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 as of 2018 within the farthest southern reaches of Canterbury. Just north of the town runs the Waitaki River, which forms the traditional border between the two regions, although the official border has moved south to put most of Waitaki District, including Duntroon, within Canterbury. To the east of the village runs the Maerewhenua River. Near the village are the Earthquakes, a limestone-cliff formation.

Waitaki District is a territorial authority district that is located in the Canterbury and Otago regions of the South Island of New Zealand. It straddles the traditional border between the two regions, the Waitaki River, and its seat is Oamaru.