New Zealand has a large number of islands.
The two main islands, which are much larger than the rest and where nearly all of the population lives, are the North Island and the South Island. The latter is often referred to as the "mainland", especially by its residents, despite it being only a little larger and having a lower population.
The following is a list of many of the islands of New Zealand:
... a median income of $53,125 versus $36,008 for females. The per capita income for the town is $26,906. 3.7% of the population and 2.6% of families are below the poverty ...