Lake Manapouri is located in the South Island of New Zealand. The lake is situated within the Fiordland National Park and the wider region of Te Wahipounamu South West New Zealand World Heritage Area.

Fiordland National Park is a national park in the south-west corner of South Island of New Zealand. It is the largest of the 13 national parks in New Zealand, with an area covering 12,607 km2 (4,868 sq mi), and a major part of the Te Wāhipounamu a UNESCO World Heritage Site established in 1990. The park is administered by the Department of Conservation. The southern ranges of the Southern Alps cover most of Fiordland National Park, combined with the deep glacier-carved valleys.