Otematata is a town in the Waitaki District of Otago in New Zealand's South Island. It is defined as a "populated area less than a town" and the 2001 New Zealand census gave the "usually resident population count" as 243. By the 2018 census it had declined to 183 inhabitants. This was considerably higher in the 1960s during the construction of the Benmore and Aviemore dams.