Dunstan High School is a state secondary school located in Alexandra, in the Central Otago district in the South Island of New Zealand.

Dunstan High School also runs the Tititea Outdoor Education Centre,[4] which is located in the old homestead in the East Matukituki Valley on the outskirts of the Mount Aspiring National Park.

In 2009, the school installed an $800,000 clean-burning heating system, replacing a coal-fuelled system,[5] and constructed a new $2.3 million gymnasium.

[6] As of November 2024, Dunstan High School has roll of 574 students, of which 104 (18.1%) identify as Māori.

[2] As of 2024, Dunstan High School has an Equity Index of 445,[7] placing it amongst schools whose students have below average socioeconomic barriers to achievement (roughly equivalent to decile 7 under the former socio-economic decile system).