City of Port PhillipPopulation forecast
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St Kilda

Population and age structure

Between 2016 and 2026, the age structure forecasts for St Kilda indicate a 2.1% increase in population under working age, a 39.3% increase in population of retirement age, and a 17.3% 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 City of Port Phillip 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
St Kilda - Total persons201620262041Change between 2016 and 2041
Age group (years)Number%Number%Number%Number
0 to 48713.69263.29793.2+108
5 to 95852.45481.95791.9-6
10 to 144561.94781.75091.6+53
15 to 195462.28763.19082.9+362
20 to 241,9888.22,7589.62,8979.3+909
25 to 294,05016.74,67016.34,92515.9+875
30 to 343,80715.74,11814.44,33814.0+531
35 to 392,3409.62,91010.13,0729.9+732
40 to 441,8907.82,2067.72,3207.5+430
45 to 491,6016.61,7606.11,9826.4+381
50 to 541,5056.21,6755.81,8405.9+336
55 to 591,3495.61,4225.01,5815.1+232
60 to 641,0174.21,1724.11,2714.1+253
65 to 698993.71,0153.51,0973.5+199
70 to 745912.47262.58742.8+283
75 to 793501.45802.07262.3+376
80 to 842300.93721.35301.7+301
85 and over2040.84741.76372.1+433
Total persons24,278100.028,685100.031,065100.0+6,787

Population and household forecasts, 2016 to 2041, prepared by .id , the population experts, December 2017.

Forecast age structure - 5 year age groups
Forecast age structure - 5 year age groups Forecast persons aged 85+,  2041: 637 Forecast persons aged 80-84,  2041: 530 Forecast persons aged 75-79,  2041: 726 Forecast persons aged 70-74,  2041: 874 Forecast persons aged 65-69,  2041: 1,097 Forecast persons aged 60-64,  2041: 1,271 Forecast persons aged 55-59,  2041: 1,581 Forecast persons aged 50-54,  2041: 1,840 Forecast persons aged 45-49,  2041: 1,982 Forecast persons aged 40-44,  2041: 2,320 Forecast persons aged 35-39,  2041: 3,072 Forecast persons aged 30-34,  2041: 4,338 Forecast persons aged 25-29,  2041: 4,925 Forecast persons aged 20-24,  2041: 2,897 Forecast persons aged 15-19,  2041: 908 Forecast persons aged 10-14,  2041: 509 Forecast persons aged 5-9,  2041: 579 Forecast persons aged 0-4,  2041: 979 Forecast persons aged 85+,  2026: 474 Forecast persons aged 80-84,  2026: 372 Forecast persons aged 75-79,  2026: 580 Forecast persons aged 70-74,  2026: 726 Forecast persons aged 65-69,  2026: 1,015 Forecast persons aged 60-64,  2026: 1,172 Forecast persons aged 55-59,  2026: 1,422 Forecast persons aged 50-54,  2026: 1,675 Forecast persons aged 45-49,  2026: 1,760 Forecast persons aged 40-44,  2026: 2,206 Forecast persons aged 35-39,  2026: 2,910 Forecast persons aged 30-34,  2026: 4,118 Forecast persons aged 25-29,  2026: 4,670 Forecast persons aged 20-24,  2026: 2,758 Forecast persons aged 15-19,  2026: 876 Forecast persons aged 10-14,  2026: 478 Forecast persons aged 5-9,  2026: 548 Forecast persons aged 0-4,  2026: 926 Forecast persons aged 85+,  2016: 204 Forecast persons aged 80-84,  2016: 230 Forecast persons aged 75-79,  2016: 350 Forecast persons aged 70-74,  2016: 591 Forecast persons aged 65-69,  2016: 899 Forecast persons aged 60-64,  2016: 1,017 Forecast persons aged 55-59,  2016: 1,349 Forecast persons aged 50-54,  2016: 1,505 Forecast persons aged 45-49,  2016: 1,601 Forecast persons aged 40-44,  2016: 1,890 Forecast persons aged 35-39,  2016: 2,340 Forecast persons aged 30-34,  2016: 3,807 Forecast persons aged 25-29,  2016: 4,050 Forecast persons aged 20-24,  2016: 1,988 Forecast persons aged 15-19,  2016: 546 Forecast persons aged 10-14,  2016: 456 Forecast persons aged 5-9,  2016: 585 Forecast persons aged 0-4,  2016: 871
Population and household forecasts, 2016 to 2041, prepared by .id the population experts, December 2017.
Forecast change in age structure - 5 year age groups
Forecast change in age structure - 5 year age groups Forecast persons aged 85+,  2026 to 2041: 163 Forecast persons aged 80-84,  2026 to 2041: 159 Forecast persons aged 75-79,  2026 to 2041: 146 Forecast persons aged 70-74,  2026 to 2041: 148 Forecast persons aged 65-69,  2026 to 2041: 82 Forecast persons aged 60-64,  2026 to 2041: 98 Forecast persons aged 55-59,  2026 to 2041: 159 Forecast persons aged 50-54,  2026 to 2041: 166 Forecast persons aged 45-49,  2026 to 2041: 222 Forecast persons aged 40-44,  2026 to 2041: 114 Forecast persons aged 35-39,  2026 to 2041: 162 Forecast persons aged 30-34,  2026 to 2041: 220 Forecast persons aged 25-29,  2026 to 2041: 255 Forecast persons aged 20-24,  2026 to 2041: 139 Forecast persons aged 15-19,  2026 to 2041: 32 Forecast persons aged 10-14,  2026 to 2041: 31 Forecast persons aged 5-9,  2026 to 2041: 31 Forecast persons aged 0-4,  2026 to 2041: 53 Forecast persons aged 85+,  2016 to 2026: 270 Forecast persons aged 80-84,  2016 to 2026: 142 Forecast persons aged 75-79,  2016 to 2026: 230 Forecast persons aged 70-74,  2016 to 2026: 135 Forecast persons aged 65-69,  2016 to 2026: 117 Forecast persons aged 60-64,  2016 to 2026: 155 Forecast persons aged 55-59,  2016 to 2026: 73 Forecast persons aged 50-54,  2016 to 2026: 170 Forecast persons aged 45-49,  2016 to 2026: 159 Forecast persons aged 40-44,  2016 to 2026: 316 Forecast persons aged 35-39,  2016 to 2026: 570 Forecast persons aged 30-34,  2016 to 2026: 310 Forecast persons aged 25-29,  2016 to 2026: 620 Forecast persons aged 20-24,  2016 to 2026: 770 Forecast persons aged 15-19,  2016 to 2026: 330 Forecast persons aged 10-14,  2016 to 2026: 22 Forecast persons aged 5-9,  2016 to 2026: -37 Forecast persons aged 0-4,  2016 to 2026: 55
Population and household forecasts, 2016 to 2041, prepared by .id the population experts, December 2017.

Key findings

In 2016, the dominant age structure for persons in St Kilda was ages 25 to 29, which accounted for 16.7% of the total persons.

The largest increase in persons between 2016 and 2026 is forecast to be in ages 20 to 24, which is expected to increase by 770 and account for 9.6% of the total persons.

The largest 5 year age group in 2026 is 25 to 29 years, with a total of 4,670 persons.

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