Hydroelectric power in New Zealand has been a part of the country's energy system for over 100 years and continues to provide more than half of the country's electricity needs. Hydroelectricity is the primary source of renewable energy in New Zealand. Power is generated the most in the South Island and is used most in the North Island.

The Clyde Dam, New Zealand's third-largest hydroelectric dam, is built on the Clutha River / Mata-Au near the town of Clyde. It is owned and operated by Contact Energy.