The Auckland metropolitan area, in the North Island of New Zealand, is the largest and most populous urban area in the country with over 1.4 million residents, 31 percent of the country's population. Demographic trends indicate that it will continue to grow faster than the rest of the country. Increasingly cosmopolitan, Auckland also has the largest Polynesian population of any city in the world,and has seen many people of Asian ethnicity move there in the last two decades. In Māori Auckland's name is Tāmaki-makau-rau, or the transliterated version of Auckland, Ākarana.

Auckland City, (informally Central Auckland) is the city and local authority covering the Auckland isthmus and most of the islands of the Hauraki Gulf, in the North Island of New Zealand. Auckland City is the most populous city in the country, with a population of 438,100 (June 2008 estimate). It lies in the Auckland Region, and the Auckland Regional Council is also based in Auckland City. In 2009, it was rated the 4th best place to live in the world, in human resources consultancy Mercer's annual survey. 
 

Auckland City is, together with its neighbouring cities, part of the Greater Auckland area. As the term 'Auckland' may refer to the local authority alone, to the whole metropolitan area, or even to the broader region, this may lead to ambiguity, since people from other parts of New Zealand or from overseas often do not draw any distinction. Via Wikipedia project.

Population of Central Auckland

Auckland's population, as the largest and most cosmopolitan city of New Zealand, is made up of 185 ethnic groups, with Europeans (49.8%), Asians (22.4%), Pacific Islanders (12%) and Maori (7.2%) making up the largest groups (2006 data).