Cook Strait in the context of "Golden Bay / Mohua"

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 North Island (Māori: Te Ika-a-Māui [tɛ i.kɐ ɐ mɑː.ʉ.i], lit. 'the fish of Māui', historically New Ulster) is one of the two main islands of New Zealand, separated from the larger but less populous South Island by Cook Strait. With an area of 113,729 km (43,911 sq mi), it is the world's 14th-largest island, constituting 43% of New Zealand's land area. It has a population of 4,067,400 (June 2025), which is 76% of New Zealand's residents, making it the most populous island in Polynesia and the 28th-most-populous island in the world.

Twelve main urban areas are in the North Island. From north to south, they are Whangārei, Auckland, Hamilton, Tauranga, Rotorua, Gisborne, New Plymouth, Napier, Hastings, Whanganui, Palmerston North, and New Zealand's capital city Wellington, which is located at the south-west tip of the island.

New Zealand consists of more than six hundred islands, mainly remnants of a larger land mass now beneath the sea. New Zealand is the sixth-largest island country, and the third-largest located entirely in the Southern Hemisphere. The following is a list of islands of New Zealand.

The two largest islands – where most of the population lives – have names in both English and in the Māori language. They are the North Island or Te Ika-a-Māui and the South Island or Te Waipounamu. Various Māori iwi sometimes use other names, with some preferring to call the South Island Te Waka o Aoraki. The two islands are separated by the Cook Strait. In general practice, the term mainland refers to the North Island and South Island. However, the South Island alone is sometimes called "the mainland" – especially by its residents, as a nickname – because it is the larger of the two main islands.

New Zealand (Māori: Aotearoa) is an island country located in the southwestern Pacific Ocean, near the centre of the water hemisphere. It consists of a large number of islands, estimated around 700, mainly remnants of a larger landmass now beneath the sea. The land masses by size are the South Island (Te Waipounamu) and the North Island (Te Ika-a-Māui), separated by the Cook Strait. The third-largest is Stewart Island (Rakiura), located 30 kilometres (19 miles) off the tip of the South Island across Foveaux Strait. Other islands are significantly smaller in area. The three largest islands stretch 1,600 kilometres (990 miles) across latitudes 35° to 47° south. New Zealand is the sixth-largest island country in the world, with a land size of 268,680 km (103,740 sq mi).

New Zealand's landscapes range from the fiord-like sounds of the southwest to the sandy beaches of the subtropical Far North. The South Island is dominated by the Southern Alps while a volcanic plateau covers much of the central North Island. Temperatures commonly fall below 0 °C (32 °F) and rise above 30 °C (86 °F) then conditions vary from wet and cold on the South Island's west coast to dry and continental a short distance away across the mountains and to the tundra like climate in the Deep South of Southland.

Wellington is the capital city of New Zealand. It is located at the south-western tip of the North Island, between Cook Strait and the Remutaka Range. Wellington is the third-largest city in New Zealand (second largest in the North Island), and is the administrative centre of the Wellington Region. It is the world's southernmost capital of a sovereign state. Wellington features a temperate maritime climate, and is the world's windiest city by average wind speed.

Māori oral tradition tells that Kupe discovered and explored the region in about the 10th century. The area was initially settled by Māori iwi such as Rangitāne and Muaūpoko. The disruptions of the Musket Wars led to them being overwhelmed by northern iwi such as Te Āti Awa in the early 19th century.

Ngāti Toa, also called Ngāti Toarangatira or Ngāti Toa Rangatira, is a Māori iwi (tribe) based in the southern North Island and the northern South Island of New Zealand. Ngāti Toa remains a small iwi with a population of about 9,000. The iwi is centred around Porirua, Plimmerton, Kāpiti, Blenheim and Arapaoa Island. It has four marae: Takapūwāhia and Hongoeka in Porirua City, and Whakatū and Wairau in the South Island. Ngāti Toa's governing body has the name Te Rūnanga o Toa Rangatira.

The iwi traces its descent from the eponymous ancestor Toarangatira. Ngāti Toa lived in the Kāwhia region of the North Island until the 1820s, when forced out by conflict with other Tainui iwi, led by Pōtatau Te Wherowhero (c. 1785 – 1860), who later became the first Māori King (r. 1858–1860). Ngāti Toa, Ngāti Rārua and Ngāti Koata, led by Te Rauparaha (c. 1765 – 1849), escaped south and invaded Taranaki and the Wellington regions together with three north Taranaki iwi, Te Āti Awa, Ngāti Tama and Ngāti Mutunga. Together they fought and conquered the people of Wellington, Ngāti Ira, who practically ceased to exist as an independent iwi.After the 1820s, the region conquered by Ngāti Toa extended from Miria-te-kakara at Rangitikei to Wellington, and across Cook Strait to Wairau and Nelson.

Te Rauparaha (c. 1760s – 27 November 1849) was a Māori rangatira, warlord, and chief of the Ngāti Toa iwi. One of the most powerful military leaders of the Musket Wars, Te Rauparaha fought a war of conquest that greatly expanded Ngāti Toa southwards, receiving the epithet "the Napoleon of the South". He remains one of the most prominent and celebrated New Zealand historical figures.

Born probably in the 1760s, Te Rauparaha's conquests eventually extended Ngāti Toa authority from Miria-te-kakara at Rangitikei to Wellington, and across Cook Strait to Wairau and Nelson. He participated in land sale and negotiations with the New Zealand Company at the beginning of the colonisation of New Zealand. An early signatory to the Treaty of Waitangi, Te Rauparaha was later central to the Wairau Affray in the Marlborough district, considered by many to be the first of the conflicts in the New Zealand Wars. Shortly before he died he led the building of Rangiātea Church in Ōtaki.

The South Island (official alternative name Te Waipounamu, from Māori) 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.