South Island

The South Island (Māori: Te Waipounamu [tɛ wɐ.i.pɔ.ʉ.nɐ.mʉ], lit. 'the waters of Greenstone') is the larger of the two main islands of New Zealand by surface area, the other being the smaller but more populous North Island. It is bordered to the north by Cook Strait, to the west by the Tasman Sea, to the south by the Foveaux Strait and Southern Ocean, and to the east by the Pacific Ocean. The South Island covers 150,437 square kilometres (58,084 sq mi), making it the world's 12th-largest island, constituting 56% of New Zealand's land area. At low altitudes, it has an oceanic climate. The most populous cities are Christchurch, Dunedin, Nelson and Invercargill.

Prior to European settlement, Te Waipounamu was sparsely populated by three major iwi – Kāi Tahu, Kāti Māmoe, and the historical Waitaha – with major settlements including in Kaiapoi Pā near modern-day Christchurch. During the Musket Wars expanding iwi colonised Te Tau Ihu, a region comprising parts of modern-day Tasman, Nelson and Marlborough, including Ngāti Kuia, Rangitāne, Ngāti Tama, and later Ngāti Toarangatira after Te Rauparaha's wars of conquest. British settlement began with expansive and cheap land purchases early on, and settlers quickly outnumbered Māori. As a result the Wairau Affray was the only conflict of the New Zealand Wars to occur in the South Island. The island became rich and prosperous and Dunedin boomed during the 1860s Otago gold rush, which was shaped by extensive Chinese immigration. After the gold rush the "drift to the north" meant the North Island displaced the South as the most populous.

The South Island is shaped by the Southern Alps, which run along the island from north to south. They include New Zealand's highest peak, Aoraki / Mount Cook, at 3,724 metres (12,218 feet). The high Kaikōura Ranges lie to the northeast. The east side of the island is home to the Canterbury Plains, while the West Coast is renowned for its rough coastlines, such as Fiordland, a very high proportion of native bush and national parks, and the Fox and Franz Josef Glaciers.

With a population of 1,242,300 as of June 2024, the South Island is home to 23% of New Zealand's 5.3 million inhabitants. After the 1860s gold rushes in the early stages of European settlement of the country, the South Island had the majority of the European population and wealth. The North Island's population overtook the South Island's in the early 20th century, with 56% of the New Zealand population living in the North Island in 1911. The drift north of people and businesses continued throughout the twentieth century.

The island has been known in English as the South Island for many years. The Te Reo Māori name for it Te Waipounamu now also has official recognition. The name is most often translated to mean "the water(s) of pounamu", but possibly evolved from Te Wāhi Pounamu ("the place of pounamu").^{[citation needed]} It was first recorded in English by Captain James Cook on his voyage to New Zealand in 1769. North Island iwi alternatively used the name Te Waka-a-Māui ("the canoe of Māui") for the South Island.

In the 19th century, some maps identified the South Island as Middle Island or New Munster (named after Munster province in Southern Ireland) with the name South Island or New Leinster was used for today's Stewart Island / Rakiura. In 1907, the Minister for Lands gave instructions to the Land and Survey Department that the name Middle Island was not to be used in the future. "South Island will be adhered to in all cases".

Although the island had been known as the South Island for many years, in 2009 the New Zealand Geographic Board found that along with the North Island, the South Island had no official name. After a public consultation, the board officially named the island South Island or Te Waipounamu in October 2013.

In prose, the two main islands of New Zealand are called the North Island and the South Island, with the definite article. It is also normal to use the preposition in rather than on, for example "Christchurch is in the South Island", "my mother lives in the South Island". Maps, headings, tables, and adjectival expressions use South Island without "the".