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Porirua CityPopulation forecast

Porirua City

Population and age structure

Between 2013 and 2028, the age structure forecasts for Porirua City indicate a 18.8% increase in females under working age, a 83.9% increase in females of retirement age, and a 24.4% increase in females 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 Porirua City 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
Porirua City - Total females201320282048Change between 2013 and 2048
Age group (years)Number%Number%Number%Number
0 to 42,2718.22,5807.23,1436.9+872
5 to 92,1467.82,5777.23,1667.0+1,020
10 to 142,0257.32,4937.03,0786.8+1,052
15 to 191,9507.12,4226.82,9166.4+965
20 to 241,8256.62,0485.72,4685.4+643
25 to 291,5705.72,0085.62,2865.0+715
30 to 341,7256.22,2616.32,5485.6+823
35 to 392,0007.22,5507.12,9826.6+982
40 to 442,2358.12,6427.43,2767.2+1,041
45 to 491,9497.12,4746.93,2917.2+1,341
50 to 541,9857.22,2916.43,0976.8+1,113
55 to 591,6305.92,1806.12,8786.3+1,247
60 to 641,4205.11,8825.32,5785.7+1,158
65 to 691,1004.01,7314.92,2625.0+1,162
70 to 747852.81,3923.91,9944.4+1,209
75 to 794401.61,1163.11,7013.7+1,261
80 to 843351.26571.81,1082.4+773
85 and over2100.83811.16731.5+463
Total persons27,601100.035,686100.045,443100.0+17,842
Population and household forecasts, 2013 to 2048, prepared by .id , the population experts, November 2019.

Key findings

In 2013, the dominant age structure for females in Porirua City was ages 0 to 4, which accounted for 8.2% of the total females.

The largest increase in females between 2013 and 2028 is forecast to be in ages 75 to 79, which is expected to increase by 676 and account for 3.1% of the total females.

The largest female 5 year age group in 2028 is 40 to 44 years, with a total of 2,642 females.

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