Porirua CityPopulation forecast
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Porirua City

Population and age structure

Between 2013 and 2028, the age structure forecasts for Porirua City indicate a 19.4% increase in population under working age, a 78.1% increase in population of retirement age, and a 22.5% 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 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 persons201320282043Change between 2013 and 2043
Age group (years)Number%Number%Number%Number
0 to 44,6308.65,3317.86,5187.7+1,888
5 to 94,3218.05,2287.66,4547.6+2,133
10 to 144,1507.75,0837.46,2837.4+2,133
15 to 194,0207.54,8307.15,7756.8+1,755
20 to 243,5106.53,9815.84,7485.6+1,237
25 to 292,9325.53,7285.44,2395.0+1,308
30 to 343,1895.94,1556.14,7025.5+1,513
35 to 393,7206.94,6646.85,4456.4+1,725
40 to 444,1707.84,8387.15,9527.0+1,782
45 to 493,8497.24,5816.75,9877.0+2,138
50 to 543,7006.94,3296.35,6276.6+1,927
55 to 593,1715.94,1296.05,1326.0+1,961
60 to 642,7205.13,6105.34,5365.3+1,816
65 to 692,1704.03,1794.63,9854.7+1,815
70 to 741,5102.82,5963.83,5124.1+2,002
75 to 798501.62,0713.02,9113.4+2,061
80 to 845901.11,2641.81,9412.3+1,350
85 and over4990.98971.31,4041.6+904
Total persons53,700100.068,495100.085,149100.0+31,448

Population and household forecasts, 2013 to 2043, prepared by .id , the population experts, January 2020.

Forecast age structure - 5 year age groups
Forecast age structure - 5 year age groups Forecast persons aged 85+,  2043: 1,404 Forecast persons aged 80-84,  2043: 1,941 Forecast persons aged 75-79,  2043: 2,911 Forecast persons aged 70-74,  2043: 3,512 Forecast persons aged 65-69,  2043: 3,985 Forecast persons aged 60-64,  2043: 4,536 Forecast persons aged 55-59,  2043: 5,132 Forecast persons aged 50-54,  2043: 5,627 Forecast persons aged 45-49,  2043: 5,987 Forecast persons aged 40-44,  2043: 5,952 Forecast persons aged 35-39,  2043: 5,445 Forecast persons aged 30-34,  2043: 4,702 Forecast persons aged 25-29,  2043: 4,239 Forecast persons aged 20-24,  2043: 4,748 Forecast persons aged 15-19,  2043: 5,775 Forecast persons aged 10-14,  2043: 6,283 Forecast persons aged 5-9,  2043: 6,454 Forecast persons aged 0-4,  2043: 6,518 Forecast persons aged 85+,  2028: 897 Forecast persons aged 80-84,  2028: 1,264 Forecast persons aged 75-79,  2028: 2,071 Forecast persons aged 70-74,  2028: 2,596 Forecast persons aged 65-69,  2028: 3,179 Forecast persons aged 60-64,  2028: 3,610 Forecast persons aged 55-59,  2028: 4,129 Forecast persons aged 50-54,  2028: 4,329 Forecast persons aged 45-49,  2028: 4,581 Forecast persons aged 40-44,  2028: 4,838 Forecast persons aged 35-39,  2028: 4,664 Forecast persons aged 30-34,  2028: 4,155 Forecast persons aged 25-29,  2028: 3,728 Forecast persons aged 20-24,  2028: 3,981 Forecast persons aged 15-19,  2028: 4,830 Forecast persons aged 10-14,  2028: 5,083 Forecast persons aged 5-9,  2028: 5,228 Forecast persons aged 0-4,  2028: 5,331 Forecast persons aged 85+,  2013: 499 Forecast persons aged 80-84,  2013: 590 Forecast persons aged 75-79,  2013: 850 Forecast persons aged 70-74,  2013: 1,510 Forecast persons aged 65-69,  2013: 2,170 Forecast persons aged 60-64,  2013: 2,720 Forecast persons aged 55-59,  2013: 3,171 Forecast persons aged 50-54,  2013: 3,700 Forecast persons aged 45-49,  2013: 3,849 Forecast persons aged 40-44,  2013: 4,170 Forecast persons aged 35-39,  2013: 3,720 Forecast persons aged 30-34,  2013: 3,189 Forecast persons aged 25-29,  2013: 2,932 Forecast persons aged 20-24,  2013: 3,510 Forecast persons aged 15-19,  2013: 4,020 Forecast persons aged 10-14,  2013: 4,150 Forecast persons aged 5-9,  2013: 4,321 Forecast persons aged 0-4,  2013: 4,630
Population and household forecasts, 2013 to 2043, prepared by .id the population experts, January 2020.
Forecast change in age structure - 5 year age groups
Forecast change in age structure - 5 year age groups Forecast persons aged 85+,  2028 to 2043: 507 Forecast persons aged 80-84,  2028 to 2043: 677 Forecast persons aged 75-79,  2028 to 2043: 840 Forecast persons aged 70-74,  2028 to 2043: 915 Forecast persons aged 65-69,  2028 to 2043: 806 Forecast persons aged 60-64,  2028 to 2043: 926 Forecast persons aged 55-59,  2028 to 2043: 1,002 Forecast persons aged 50-54,  2028 to 2043: 1,298 Forecast persons aged 45-49,  2028 to 2043: 1,406 Forecast persons aged 40-44,  2028 to 2043: 1,114 Forecast persons aged 35-39,  2028 to 2043: 780 Forecast persons aged 30-34,  2028 to 2043: 548 Forecast persons aged 25-29,  2028 to 2043: 511 Forecast persons aged 20-24,  2028 to 2043: 766 Forecast persons aged 15-19,  2028 to 2043: 945 Forecast persons aged 10-14,  2028 to 2043: 1,200 Forecast persons aged 5-9,  2028 to 2043: 1,225 Forecast persons aged 0-4,  2028 to 2043: 1,187 Forecast persons aged 85+,  2013 to 2028: 397 Forecast persons aged 80-84,  2013 to 2028: 674 Forecast persons aged 75-79,  2013 to 2028: 1,221 Forecast persons aged 70-74,  2013 to 2028: 1,086 Forecast persons aged 65-69,  2013 to 2028: 1,009 Forecast persons aged 60-64,  2013 to 2028: 890 Forecast persons aged 55-59,  2013 to 2028: 959 Forecast persons aged 50-54,  2013 to 2028: 629 Forecast persons aged 45-49,  2013 to 2028: 732 Forecast persons aged 40-44,  2013 to 2028: 668 Forecast persons aged 35-39,  2013 to 2028: 945 Forecast persons aged 30-34,  2013 to 2028: 966 Forecast persons aged 25-29,  2013 to 2028: 797 Forecast persons aged 20-24,  2013 to 2028: 471 Forecast persons aged 15-19,  2013 to 2028: 810 Forecast persons aged 10-14,  2013 to 2028: 933 Forecast persons aged 5-9,  2013 to 2028: 907 Forecast persons aged 0-4,  2013 to 2028: 702
Population and household forecasts, 2013 to 2043, prepared by .id the population experts, January 2020.

Key findings

In 2013, the dominant age structure for persons in Porirua City was ages 0 to 4, which accounted for 8.6% of the total persons.

The largest increase in persons between 2013 and 2028 is forecast to be in ages 75 to 79, which is expected to increase by 1,221 and account for 3.0% of the total persons.

The largest 5 year age group in 2028 is 0 to 4 years, with a total of 5,331 persons.

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