The Auckland Region is one of the sixteen regions of New Zealand, named for the city of Auckland, the country’s largest urban area.

On the mainland, the region extends from the mouth of the Kaipara Harbour in the north across the southern stretches of the Northland Peninsula, past the Waitakere Ranges and the isthmus of Auckland and across the low-lying land surrounding the Manukau Harbour. The region ends within a few kilometres of the mouth of the Waikato River. It is bordered in the north by the Northland Region, and in the south by the Waikato Region. It also includes the islands of the Hauraki Gulf.

The Hunua Ranges and the adjacent coastline along the Firth of Thames were part of the region until the Auckland Council was formed in late 2010, when they were transferred to the neighbouring Waikato Region.

In land area it is smaller than all the other regions and unitary authorities except Nelson. Its highest point is the summit of Little Barrier Island, at 722 metres.