Dunedin (/dʌˈniːdɨn/ ( listen) du-NEE-dən; Māori: Ōtepoti) is the second-largest city in the South Island of New Zealand, and the principal city of the Otago Region. While Tauranga and Hamilton have eclipsed the city in population in recent years, it is considered to be one of the four main urban centres of New Zealand for historic, cultural, and geographic reasons. Dunedin was the largest city by territorial land area until superseded by Auckland on the creation of the Auckland Council in November 2010. Dunedin was the largest city in New Zealand by population until about 1900.

The Dunedin urban area lies on the central-eastern coast of Otago, surrounding the head of Otago Harbour. The harbour and hills around Dunedin are the remnants of an extinct volcano. The city suburbs extend out into the surrounding valleys and hills, onto the isthmus of the Otago Peninsula, and along the shores of the Otago Harbour and the Pacific Ocean.

The city's largest industry is tertiary education – Dunedin is home to the University of Otago, New Zealand's first university (1869), and the Otago Polytechnic. Students account for a large proportion of the population: 21.6 percent of the city's population was aged between 15 and 24 at the 2006 census, compared to the New Zealand average of 14.2 percent.

New Zealand (Māori: Aotearoa) is an island country located in the southwestern Pacific Ocean. The country geographically comprises two main landmasses ‒ that of the North and South Islands ‒ as well as numerous smaller islands. New Zealand is situated some 1,500 kilometres (900 mi) east of Australia across the Tasman Sea and roughly 1,000 kilometres (600 mi) south of the Pacific island nations of New Caledonia, Fiji, and Tonga. Because of its remoteness, it was one of the last lands to be settled by humans.

During its long isolation, New Zealand developed a distinctive biodiversity of both animal and plant life. Most notable are the large number of unique bird species, many of which became extinct after the arrival of humans and introduced mammals. With a mild maritime climate, the land was mostly covered in forest. The country's varied topography and its sharp mountain peaks owe much to the tectonic uplift of land and volcanic eruptions caused by the Pacific and Indo-Australian Plates clashing beneath the earth's surface.