Great Barrier Island lies in the outer Hauraki Gulf, New Zealand, north-east of central Auckland. With an area of it is the sixth-largest island of New Zealand and fourth-largest in the main chain. Its highest point, Mount Hobson, is above sea level. The local authority is the Auckland Council.
The island was initially exploited for its minerals and kauri trees and saw only limited agriculture. In 2013, it was inhabited by 939 people, mostly living from farming and tourism. The majority of the diverse environments (around 60% of the total area) is administered as nature reserve by the Department of Conservation. In 2009 the island atmosphere was described as being "life in New Zealand many decades back", not without some positive emphasis.