Subnational population estimates give the best available measure of the size and age-sex composition of New Zealand's 16 regional council areas (regions) and 67 territorial authority areas.
In the June 2012 year the estimates indicate:
- Christchurch city's population decreased by 4,600 people (1.2 percent).
- 38 territorial authority areas experienced population growth.
- The fastest-growing territorial authority area was Selwyn district (up 2.9 percent).
- Canterbury region's population decreased by 1,800 people (0.3 percent).
- Auckland accounted for three-quarters of New Zealand's population growth, increasing 21,700 (1.5 percent).
- Waikato and Nelson regions both grew 0.8 percent, slightly above the national average (0.6 percent).