City of OnkaparingaPopulation forecast
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City of Onkaparinga

Population and age structure

Between 2011 and 2026, the age structure forecasts for the City of Onkaparinga indicate a 18.2% increase in population under working age, a 57.7% increase in population of retirement age, and a 10.3% 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 the City of Onkaparinga 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
City of Onkaparinga - Total persons201120262036Change between 2011 and 2036
Age group (years)Number%Number%Number%Number
0 to 4 10,5406.512,1886.313,3986.2+2,858
5 to 9 10,1116.212,4916.513,7436.4+3,632
10 to 14 10,7026.512,3926.413,6946.4+2,992
15 to 19 11,1836.811,9346.213,2846.2+2,101
20 to 24 10,7486.611,3335.912,7155.9+1,967
25 to 29 10,9216.712,1526.313,3716.2+2,450
30 to 34 10,3346.312,9696.714,1556.6+3,821
35 to 39 10,7836.613,2756.914,6026.8+3,819
40 to 44 11,5547.113,2976.914,7016.8+3,147
45 to 49 11,5397.112,5066.514,1886.6+2,649
50 to 54 11,4507.011,7376.113,3136.2+1,863
55 to 59 10,7506.611,1425.812,2325.7+1,482
60 to 64 10,3866.410,5645.511,4105.3+1,024
65 to 69 7,4794.69,8815.110,5184.9+3,039
70 to 74 5,1863.28,7734.59,3774.4+4,191
75 to 79 3,7922.37,4883.98,0373.7+4,245
80 to 84 3,1381.94,8422.56,1522.9+3,014
85 and over2,8001.74,3332.25,8572.7+3,057
Total persons163,396100.0193,296100.0214,746100.0+51,350

Population and household forecasts, 2011 to 2036, prepared by .id , the population experts, April 2016.

Forecast age structure - 5 year age groups
Forecast age structure - 5 year age groups Forecast persons aged 85+,  2036: 5,857 Forecast persons aged 80-84,  2036: 6,152 Forecast persons aged 75-79,  2036: 8,037 Forecast persons aged 70-74,  2036: 9,377 Forecast persons aged 65-69,  2036: 10,518 Forecast persons aged 60-64,  2036: 11,410 Forecast persons aged 55-59,  2036: 12,232 Forecast persons aged 50-54,  2036: 13,313 Forecast persons aged 45-49,  2036: 14,188 Forecast persons aged 40-44,  2036: 14,701 Forecast persons aged 35-39,  2036: 14,602 Forecast persons aged 30-34,  2036: 14,155 Forecast persons aged 25-29,  2036: 13,371 Forecast persons aged 20-24,  2036: 12,715 Forecast persons aged 15-19,  2036: 13,284 Forecast persons aged 10-14,  2036: 13,694 Forecast persons aged 5-9,  2036: 13,743 Forecast persons aged 0-4,  2036: 13,398 Forecast persons aged 85+,  2026: 4,333 Forecast persons aged 80-84,  2026: 4,842 Forecast persons aged 75-79,  2026: 7,488 Forecast persons aged 70-74,  2026: 8,773 Forecast persons aged 65-69,  2026: 9,881 Forecast persons aged 60-64,  2026: 10,564 Forecast persons aged 55-59,  2026: 11,142 Forecast persons aged 50-54,  2026: 11,737 Forecast persons aged 45-49,  2026: 12,506 Forecast persons aged 40-44,  2026: 13,297 Forecast persons aged 35-39,  2026: 13,275 Forecast persons aged 30-34,  2026: 12,969 Forecast persons aged 25-29,  2026: 12,152 Forecast persons aged 20-24,  2026: 11,333 Forecast persons aged 15-19,  2026: 11,934 Forecast persons aged 10-14,  2026: 12,392 Forecast persons aged 5-9,  2026: 12,491 Forecast persons aged 0-4,  2026: 12,188 Forecast persons aged 85+,  2011: 2,800 Forecast persons aged 80-84,  2011: 3,138 Forecast persons aged 75-79,  2011: 3,792 Forecast persons aged 70-74,  2011: 5,186 Forecast persons aged 65-69,  2011: 7,479 Forecast persons aged 60-64,  2011: 10,386 Forecast persons aged 55-59,  2011: 10,750 Forecast persons aged 50-54,  2011: 11,450 Forecast persons aged 45-49,  2011: 11,539 Forecast persons aged 40-44,  2011: 11,554 Forecast persons aged 35-39,  2011: 10,783 Forecast persons aged 30-34,  2011: 10,334 Forecast persons aged 25-29,  2011: 10,921 Forecast persons aged 20-24,  2011: 10,748 Forecast persons aged 15-19,  2011: 11,183 Forecast persons aged 10-14,  2011: 10,702 Forecast persons aged 5-9,  2011: 10,111 Forecast persons aged 0-4,  2011: 10,540
Population and household forecasts, 2011 to 2036, prepared by .id the population experts, April 2016.
Forecast change in age structure - 5 year age groups
Forecast change in age structure - 5 year age groups Forecast persons aged 85+,  2026 to 2036: 1,524 Forecast persons aged 80-84,  2026 to 2036: 1,310 Forecast persons aged 75-79,  2026 to 2036: 550 Forecast persons aged 70-74,  2026 to 2036: 603 Forecast persons aged 65-69,  2026 to 2036: 637 Forecast persons aged 60-64,  2026 to 2036: 846 Forecast persons aged 55-59,  2026 to 2036: 1,089 Forecast persons aged 50-54,  2026 to 2036: 1,577 Forecast persons aged 45-49,  2026 to 2036: 1,682 Forecast persons aged 40-44,  2026 to 2036: 1,405 Forecast persons aged 35-39,  2026 to 2036: 1,327 Forecast persons aged 30-34,  2026 to 2036: 1,186 Forecast persons aged 25-29,  2026 to 2036: 1,219 Forecast persons aged 20-24,  2026 to 2036: 1,382 Forecast persons aged 15-19,  2026 to 2036: 1,349 Forecast persons aged 10-14,  2026 to 2036: 1,301 Forecast persons aged 5-9,  2026 to 2036: 1,252 Forecast persons aged 0-4,  2026 to 2036: 1,210 Forecast persons aged 85+,  2011 to 2026: 1,533 Forecast persons aged 80-84,  2011 to 2026: 1,704 Forecast persons aged 75-79,  2011 to 2026: 3,696 Forecast persons aged 70-74,  2011 to 2026: 3,587 Forecast persons aged 65-69,  2011 to 2026: 2,402 Forecast persons aged 60-64,  2011 to 2026: 178 Forecast persons aged 55-59,  2011 to 2026: 392 Forecast persons aged 50-54,  2011 to 2026: 287 Forecast persons aged 45-49,  2011 to 2026: 967 Forecast persons aged 40-44,  2011 to 2026: 1,743 Forecast persons aged 35-39,  2011 to 2026: 2,492 Forecast persons aged 30-34,  2011 to 2026: 2,635 Forecast persons aged 25-29,  2011 to 2026: 1,231 Forecast persons aged 20-24,  2011 to 2026: 585 Forecast persons aged 15-19,  2011 to 2026: 751 Forecast persons aged 10-14,  2011 to 2026: 1,690 Forecast persons aged 5-9,  2011 to 2026: 2,380 Forecast persons aged 0-4,  2011 to 2026: 1,648
Population and household forecasts, 2011 to 2036, prepared by .id the population experts, April 2016.

Key findings

In 2011, the dominant age structure for persons in the City of Onkaparinga was ages 40 to 44 , which accounted for 7.1% of the total persons.

The largest increase in persons between 2011 and 2026 is forecast to be in ages 75 to 79 , which is expected to increase by 3,696 and account for 3.9% of the total persons.

The largest 5 year age group in 2026 is 40 to 44 years, with a total of 13,297 persons.

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