Lake Wānaka is New Zealand's fourth-largest lake and the seat of the town of Wānaka in the Otago region. The lake is 278 meters above sea level, covers 192 km² (74 sq mi), and is more than 300 m (980 ft) deep.

"Wānaka" is the South Island dialect pronunciation of wānanga, which means "the lore of the tohunga or priest" or a place of learning.