Maud Island () is one of the larger islands in the Marlborough Sounds on the northeastern tip of the South Island of New Zealand, with a total area of .
Maud Island is situated approximately halfway along the convoluted Pelorus Sound / Te Hoiere, between two long peninsulas of the South Island. It is separated from the mainland in the west by Apuau Channel and in the north and east by WaitÃÂtÃÂ Reach. To its south lies Tawhitinui Reach.
The island comprises two main parts: the bulk of the island lies to the west and is oriented roughly northeast to southwest; a smaller spur, connected by a narrow 1-kilometre long isthmus, lies to the east. The island's southernmost point, Harter Point, is on this spur. The island is hilly, reaching a height of in the west and on the spur.
A walking track, the Gun Emplacement Track, circles the western part of the island.
The first human settlement on the island was by MÃÂori, who cultivated extensive gardens and built food storage pits and gave the island the name Te PÃÂkeka. Ownership of the island was granted to European settler John Gibson in 1867.
Military installations were built on the island during World War II. Remains of the old gun emplacements and range finding equipment can be seen from the track, close to the island's northernmost point. A jetty was installed on the island at the same time, to enable the equipment to be maintained. In 1971, then-owner Jack Shand gifted some of the island to the Crown; the rest of the island became Royal Forest and Bird Protection property soon afterwards.
Maud Island is an important predator free nature reserve (officially a Scientific Reserve as defined under New Zealand's Reserves Act) to which only scientists and conservationists have access. Visitors need a special permit issued by the New Zealand Department of Conservation.
Thanks to the efforts of conservationist Don Merton, kÃÂkÃÂpà  was introduced onto the predator-free island in 1974. Additional kÃÂkÃÂpà  were subsequently translocated onto other Islands like Codfish Island / Whenua Hou, Anchor Island and Little Barrier Island.
After only one breeding attempt by pair Flossie and Richard Henry in 1998 where three chicks were born, Maud Island's kÃÂkÃÂpà  population was translocated to more forested islands. The takahàwas also introduced there in 1985.
Another rare species is the Maud Island frog (Leiopelma pakeka), which was split from the Hamilton's frog (Leiopelma hamiltoni) but has now been synonymized with L. hamiltoni. Maud Island has a rich invertebrate fauna. WÃÂtÃÂ are numerous with tree wÃÂtÃÂ, cave wÃÂtÃÂ and Cook Strait giant wÃÂtÃÂ likely to be seen at night. A large weevil, the flax weevil can be seen on flax and the rare Cook Strait click beetle is also present on the island.
The island's two names, Maud Island and Te Hoiere, were both given official status in 1948. Te Hoiere is also used as the MÃÂori name for Pelorus Sound. The island's former name of Te PÃÂkeka is still used for the Te PÃÂkeka/Maud Island Scientific Reserve.