New Leinster was a province

Provinces of New Zealand

The Provinces of New Zealand existed from 1841 until 1876 as a form of sub-national government. They were replaced by counties, which were themselves replaced by districts.Following abolition, the provinces became known as provincial districts...

 of New Zealand

New Zealand

New Zealand is an island country in the south-western Pacific Ocean comprising two main landmasses and numerous smaller islands. The country is situated some east of Australia across the Tasman Sea, and roughly south of the Pacific island nations of New Caledonia, Fiji, and Tonga...

, consisting of Stewart Island/Rakiura

Stewart Island/Rakiura

Stewart Island/Rakiura is the third-largest island of New Zealand. It lies south of the South Island, across Foveaux Strait. Its permanent population is slightly over 400 people, most of whom live in the settlement of Oban.- History and naming :...

 named after the Irish

Ireland

Ireland is an island to the northwest of continental Europe. It is the third-largest island in Europe and the twentieth-largest island on Earth...

 province of Leinster

Leinster

Leinster is one of the Provinces of Ireland situated in the east of Ireland. It comprises the ancient Kingdoms of Mide, Osraige and Leinster. Following the Norman invasion of Ireland, the historic fifths of Leinster and Mide gradually merged, mainly due to the impact of the Pale, which straddled...

.

Governor William Hobson

William Hobson

Captain William Hobson RN was the first Governor of New Zealand and co-author of the Treaty of Waitangi.-Early life:...

 named the North Island New Ulster

New Ulster

New Ulster was the name of a province of New Zealand that existed between 1841 and 1853.-Original province:Between 1841 and 1846 the province included all the North Island north of the Patea River. With the passing of the New Zealand Constitution Act 1846, the province came to include all of the...

, the South Island New Munster and Stewart Island/Rakiura New Leinster after the correspondence regions in Ireland in 1840. In 1840, a Royal Charter created the separate colony of New Zealand and the three
main islands were officially named New Ulster, New Munster and New Leinster. Being much smaller than the other two provinces and having almost no population, it existed only on paper, and was governed (to the extent that it was governed at all) from Auckland

Auckland

The Auckland metropolitan area , in the North Island of New Zealand, is the largest and most populous urban area in the country with residents, percent of the country's population. Auckland also has the largest Polynesian population of any city in the world...

. New Leinster was merged into the province of New Munster with the passage of the New Zealand Constitution Act

New Zealand Constitution Act 1846

The New Zealand Constitution Act 1846 was an Act of the Parliament of the United Kingdom intended to grant self-government to the colony of New Zealand, but it was never fully implemented...

in 1846 and all three provinces names were abolished in 1852.