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Porirua CityPopulation forecast

Titahi Bay

Population and age structure

Between 2013 and 2038, the age structure forecasts for Titahi Bay indicate a 6.4% decrease in population under working age, a 60.0% increase in population of retirement age, and a 0.8% increase in population of working age.

Knowledge of how the age structure of the population is changing is essential for planning age-based facilities and services, such as child care, recreation and aged care.

The forecast age groups of Titahi Bay is a function of the current age of the population (people aging each year, being born and dying) as well as the age of people migrating into and out of the area. This in turn is driven by location (fringe, city centre, regional or rural) the existing housing stock (separate dwellings, medium or high density), the amount and type of new residential development (same as existing stock, or diversifying) and where the area is in a cycle of change. We call this the area’s residential role and function. You can learn more about this in the section household and suburb life cycles.

Forecast age structure - 5 year age groups
Titahi Bay - Total persons201320382048Change between 2013 and 2048
Age group (years)Number%Number%Number%Number
0 to 44249.63617.83737.8-51
5 to 93798.63457.43557.4-25
10 to 142856.43126.73196.7+35
15 to 192555.83046.53086.5+53
20 to 243026.82886.22916.1-10
25 to 292786.32735.92745.7-4
30 to 343016.82856.12936.1-8
35 to 393347.63196.93337.0-2
40 to 443578.13216.93316.9-26
45 to 492666.03046.63056.4+39
50 to 542856.42906.32946.2+9
55 to 592766.22806.02856.0+9
60 to 642375.42515.42515.3+14
65 to 691774.02204.72194.6+42
70 to 741152.61733.71944.1+80
75 to 79691.61533.31703.6+101
80 to 84451.01022.21112.3+66
85 and over340.8561.2661.4+32
Total persons4,421100.04,638100.04,772100.0+351
Population and household forecasts, 2013 to 2048, prepared by .id , the population experts, November 2019.

Key findings

In 2013, the dominant age structure for persons in Titahi Bay was ages 0 to 4, which accounted for 9.6% of the total persons.

The largest increase in persons between 2013 and 2038 is forecast to be in ages 75 to 79, which is expected to increase by 84 and account for 3.3% of the total persons.

The largest 5 year age group in 2038 is 0 to 4 years, with a total of 361 persons.

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