Porirua CityPopulation forecast
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Whitby West

Population and age structure

Between 2013 and 2028, the age structure forecasts for Whitby West indicate a 21.9% decrease in population under working age, a 60.2% increase in population of retirement age, and a 5.1% decrease 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
Whitby West - Total persons201320282043Change between 2013 and 2043
Age group (years)Number%Number%Number%Number
0 to 43257.92837.13127.7-13
5 to 93348.12526.32676.6-67
10 to 143127.62235.62155.3-97
15 to 192506.12456.11704.2-80
20 to 242014.91904.81433.5-58
25 to 292235.41954.91814.5-42
30 to 342596.32396.02516.2-7
35 to 393227.82897.23057.5-17
40 to 443689.03137.83278.1-41
45 to 493127.63037.63137.7+2
50 to 543197.82957.42947.2-25
55 to 592716.62857.12706.7-2
60 to 642024.92355.92395.9+37
65 to 691934.72205.52185.4+25
70 to 741212.91844.62045.0+84
75 to 79621.51363.41704.2+109
80 to 84260.6852.11162.9+90
85 and over100.2350.9581.4+48
Total persons4,107100.04,006100.04,053100.0-54

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: 58 Forecast persons aged 80-84,  2043: 116 Forecast persons aged 75-79,  2043: 170 Forecast persons aged 70-74,  2043: 204 Forecast persons aged 65-69,  2043: 218 Forecast persons aged 60-64,  2043: 239 Forecast persons aged 55-59,  2043: 270 Forecast persons aged 50-54,  2043: 294 Forecast persons aged 45-49,  2043: 313 Forecast persons aged 40-44,  2043: 327 Forecast persons aged 35-39,  2043: 305 Forecast persons aged 30-34,  2043: 251 Forecast persons aged 25-29,  2043: 181 Forecast persons aged 20-24,  2043: 143 Forecast persons aged 15-19,  2043: 170 Forecast persons aged 10-14,  2043: 215 Forecast persons aged 5-9,  2043: 267 Forecast persons aged 0-4,  2043: 312 Forecast persons aged 85+,  2028: 35 Forecast persons aged 80-84,  2028: 85 Forecast persons aged 75-79,  2028: 136 Forecast persons aged 70-74,  2028: 184 Forecast persons aged 65-69,  2028: 220 Forecast persons aged 60-64,  2028: 235 Forecast persons aged 55-59,  2028: 285 Forecast persons aged 50-54,  2028: 295 Forecast persons aged 45-49,  2028: 303 Forecast persons aged 40-44,  2028: 313 Forecast persons aged 35-39,  2028: 289 Forecast persons aged 30-34,  2028: 239 Forecast persons aged 25-29,  2028: 195 Forecast persons aged 20-24,  2028: 190 Forecast persons aged 15-19,  2028: 245 Forecast persons aged 10-14,  2028: 223 Forecast persons aged 5-9,  2028: 252 Forecast persons aged 0-4,  2028: 283 Forecast persons aged 85+,  2013: 10 Forecast persons aged 80-84,  2013: 26 Forecast persons aged 75-79,  2013: 62 Forecast persons aged 70-74,  2013: 121 Forecast persons aged 65-69,  2013: 193 Forecast persons aged 60-64,  2013: 202 Forecast persons aged 55-59,  2013: 271 Forecast persons aged 50-54,  2013: 319 Forecast persons aged 45-49,  2013: 312 Forecast persons aged 40-44,  2013: 368 Forecast persons aged 35-39,  2013: 322 Forecast persons aged 30-34,  2013: 259 Forecast persons aged 25-29,  2013: 223 Forecast persons aged 20-24,  2013: 201 Forecast persons aged 15-19,  2013: 250 Forecast persons aged 10-14,  2013: 312 Forecast persons aged 5-9,  2013: 334 Forecast persons aged 0-4,  2013: 325
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: 22 Forecast persons aged 80-84,  2028 to 2043: 30 Forecast persons aged 75-79,  2028 to 2043: 35 Forecast persons aged 70-74,  2028 to 2043: 20 Forecast persons aged 65-69,  2028 to 2043: -2 Forecast persons aged 60-64,  2028 to 2043: 4 Forecast persons aged 55-59,  2028 to 2043: -15 Forecast persons aged 50-54,  2028 to 2043: -2 Forecast persons aged 45-49,  2028 to 2043: 10 Forecast persons aged 40-44,  2028 to 2043: 14 Forecast persons aged 35-39,  2028 to 2043: 16 Forecast persons aged 30-34,  2028 to 2043: 13 Forecast persons aged 25-29,  2028 to 2043: -14 Forecast persons aged 20-24,  2028 to 2043: -47 Forecast persons aged 15-19,  2028 to 2043: -75 Forecast persons aged 10-14,  2028 to 2043: -7 Forecast persons aged 5-9,  2028 to 2043: 15 Forecast persons aged 0-4,  2028 to 2043: 29 Forecast persons aged 85+,  2013 to 2028: 25 Forecast persons aged 80-84,  2013 to 2028: 60 Forecast persons aged 75-79,  2013 to 2028: 74 Forecast persons aged 70-74,  2013 to 2028: 64 Forecast persons aged 65-69,  2013 to 2028: 27 Forecast persons aged 60-64,  2013 to 2028: 33 Forecast persons aged 55-59,  2013 to 2028: 13 Forecast persons aged 50-54,  2013 to 2028: -23 Forecast persons aged 45-49,  2013 to 2028: -8 Forecast persons aged 40-44,  2013 to 2028: -55 Forecast persons aged 35-39,  2013 to 2028: -33 Forecast persons aged 30-34,  2013 to 2028: -20 Forecast persons aged 25-29,  2013 to 2028: -28 Forecast persons aged 20-24,  2013 to 2028: -11 Forecast persons aged 15-19,  2013 to 2028: -5 Forecast persons aged 10-14,  2013 to 2028: -89 Forecast persons aged 5-9,  2013 to 2028: -82 Forecast persons aged 0-4,  2013 to 2028: -42
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 Whitby West was ages 40 to 44, which accounted for 9.0% 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 74 and account for 3.4% of the total persons.

The largest 5 year age group in 2028 is 40 to 44 years, with a total of 313 persons.

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