Great Mercury Airport (ICAO: NZGR) is a small private airstrip located on Great Mercury Island (Māori: Ahuahu), situated in the Hauraki Gulf off the Coromandel Peninsula of New Zealand's North Island. The island is privately owned and is not accessible to the general public without permission, and the airstrip exists primarily to serve the island's owners, staff, and occasional invited guests. The airstrip is a basic grass runway facility with no commercial airline services, passenger terminals, or public transport links. Access to Great Mercury Island is typically by private aircraft or boat, and the airport plays a key role in connecting the island to the mainland given its remote offshore location.