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LEARN MORE ABOUT .idIn 2021, the largest age group in Mosman Council area was 50 to 54 year olds. The group that changed the most since 1991 was 55 to 59 year olds, increasing by 977 people.
The Age Structure of Mosman Council area provides key insights into the level of demand for age based services and facilities such as child care. It is also an indicator of Mosman Council area's residential role and function and how it is likely to change in the future.
Five year age groups present a classic age profile of the population. Each age group covers exactly five years, which enables direct comparison between each group.
To get a more complete picture Mosman Council area's Age Structure should be viewed in conjunction with Household Types and Dwelling Types.
Q:
Derived from the Census question:
'What is the person's date of birth or age?'
| Age structure - Five year age groups | |||||||
|---|---|---|---|---|---|---|---|
| Mosman Council area - Total persons (Enumerated) | 2021 | 1991 | Change | ||||
| Five year age groups (years) | Number | % | Greater Sydney % | Number | % | Greater Sydney % | 1991 to 2021 |
| 0 to 4 | 1,204 | 4.4 | 6.0 | 1,339 | 5.3 | 7.2 | -135 |
| 5 to 9 | 1,479 | 5.4 | 6.3 | 1,238 | 4.9 | 6.9 | +241 |
| 10 to 14 | 1,810 | 6.6 | 6.2 | 1,419 | 5.6 | 7.0 | +391 |
| 15 to 19 | 1,579 | 5.7 | 5.6 | 1,615 | 6.4 | 7.8 | -36 |
| 20 to 24 | 1,316 | 4.8 | 6.5 | 2,044 | 8.1 | 8.3 | -728 |
| 25 to 29 | 1,307 | 4.7 | 7.5 | 2,239 | 8.9 | 8.4 | -932 |
| 30 to 34 | 1,614 | 5.8 | 8.0 | 2,189 | 8.7 | 8.4 | -575 |
| 35 to 39 | 1,786 | 6.5 | 7.9 | 1,966 | 7.8 | 7.7 | -180 |
| 40 to 44 | 1,811 | 6.6 | 7.0 | 2,230 | 8.8 | 7.6 | -419 |
| 45 to 49 | 2,039 | 7.4 | 6.6 | 1,944 | 7.7 | 6.1 | +95 |
| 50 to 54 | 2,068 | 7.5 | 6.2 | 1,356 | 5.4 | 4.9 | +712 |
| 55 to 59 | 1,881 | 6.8 | 5.8 | 904 | 3.6 | 4.1 | +977 |
| 60 to 64 | 1,686 | 6.1 | 5.3 | 1,030 | 4.1 | 4.1 | +656 |
| 65 to 69 | 1,466 | 5.3 | 4.5 | 995 | 3.9 | 3.8 | +471 |
| 70 to 74 | 1,495 | 5.4 | 3.9 | 905 | 3.6 | 3.0 | +590 |
| 75 to 79 | 1,305 | 4.7 | 2.8 | 786 | 3.1 | 2.3 | +519 |
| 80 to 84 | 840 | 3.0 | 2.0 | 654 | 2.6 | 1.3 | +186 |
| 85 and over | 912 | 3.3 | 2.0 | 370 | 1.5 | 0.9 | +542 |
| Total population | 27,598 | 100.0 | 100.0 | 25,223 | 100.0 | 100.0 | +2,375 |
Dominant groups
Analysis of the five year age groups of Mosman Council area in 2021 compared to Greater Sydney shows that there was a lower proportion of people in the younger age groups (under 15) and a higher proportion of people in the older age groups (65+).
Overall, 16.3% of the population was aged between 0 and 15, and 21.8% were aged 65 years and over, compared with 18.4% and 15.2% respectively for Greater Sydney.
The major differences between the age structure of Mosman Council area and Greater Sydney were:
- A larger percentage of persons aged 75 to 79 (4.7% compared to 2.8%)
- A smaller percentage of persons aged 25 to 29 (4.7% compared to 7.5%)
- A smaller percentage of persons aged 30 to 34 (5.8% compared to 8.0%)
- A smaller percentage of persons aged 20 to 24 (4.8% compared to 6.5%)
Emerging groups
From 1991 to 2021, Mosman Council area's population increased by 2,375 people (9.4%). This represents an average annual population change of 0.3% per year over the period.
The largest changes in age structure in this area between 1991 and 2021 were in the age groups:
- 55 to 59 (+977 persons)
- 25 to 29 (-932 persons)
- 20 to 24 (-728 persons)
- 50 to 54 (+712 persons)
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