Like the rest of New Zealand, Christchurch has an ageing population.

Median age

  • In 2013, the median age of Christchurch City's population was estimated to be 38 years.
  • This was slightly higher than the national median age of 37.5 years.
  • By 2043, the city's median age is projected(external link) to be 42.6 years, slightly lower than the national median of 43 years.



Ageing population

  • The number of older people (aged 65 years and over) is projected to more than double between 2013 and 2043, increasing from 52,100 to 105,700.
  • As a proportion of the total population, the 65 years and over age group will increase from 15% to 23%. 
  • The population aged 85 years and over is expected to almost triple, from 7400 to 20,100 over the same period. 
  • The number of children (aged under 15 years) is projected to slightly increase to from 64,000 in 2013 to 69,400 by 2043. However, as a proportion of the total population, this cohort will decrease from 18% of the population to 15%. 


Population pyramid

  • The greatest differences between males and females will occur in two distinct broad age groups: the 40-59 year and 70+ year age groups.
  • In the 40 to 59 year age group, there were 2300 (5%) more females than males in 2013.
  • By 2043 it is expected there will be 7100 more males than females in this age group (12% more males than females).
  • In the 70 years and over age group, there were 5350 (35%) more females than males in 2013.
  • By 2043, women will continue to outnumber men - by around 9750 (26% more) -  in large part because overall women have longer life expectancies than men.

Explore more data

Interactive data and visualisations are available on Statistics New Zealand's website:

1. View and download customisable population tables from Statistics New Zealand's NZ.Stat tool(external link)(external link):

  • Available for population estimates, census counts, and population projections.
  • Can be selected for a range of geographies (including suburb level) and years by age and sex.

2. View Statistics New Zealand's 2018 Census map gallery(external link)(external link) for maps showing population change between the 2013 and 2018 censuses:

  • Can be selected for a range of geographies (including suburb level) by age and sex.

Information about this data

Statistics New Zealand is responsible for producing official age counts, estimates and projections:

1. Census usually resident population count(external link)(external link) aims to count everyone in New Zealand on census night (and determine where in New Zealand they usually reside), but it excludes residents temporarily overseas on census night.

2. Population estimates(external link)(external link) at 30 June are produced annually and are based on the 5-yearly census usually resident population count. The estimated population includes residents not counted on census day (e.g. temporarily overseas), and is updated annually to include births, deaths and net migration.

3. Population projections(external link)(external link) use population estimates as a starting point, and are based on different combinations of fertility, mortality, and migration assumptions (low, medium, and high).

Further information outlining the difference between the three population measures are available here(external link)(external link).

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