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LEARN MORE ABOUT .idIn 2021, the largest age group in Altona - Seaholme was 35 to 39 year olds. The group that changed the most since 1991 was 20 to 24 year olds, decreasing by 594 people.
The Age Structure of Altona - Seaholme provides key insights into the level of demand for age based services and facilities such as child care. It is also an indicator of Altona - Seaholme'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 Altona - Seaholme'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 | |||||||
|---|---|---|---|---|---|---|---|
| Altona - Seaholme - Total persons (Enumerated) | 2021 | 1991 | Change | ||||
| Five year age groups (years) | Number | % | Williamstown North - The Rifle Range % | Number | % | Williamstown North - The Rifle Range % | 1991 to 2021 |
| 0 to 4 | 776 | 5.8 | 4.1 | 647 | 5.3 | 6.5 | +129 |
| 5 to 9 | 867 | 6.5 | 4.8 | 651 | 5.3 | 4.6 | +216 |
| 10 to 14 | 712 | 5.3 | 6.8 | 820 | 6.7 | 4.6 | -108 |
| 15 to 19 | 568 | 4.2 | 7.7 | 965 | 7.9 | 6.5 | -397 |
| 20 to 24 | 532 | 4.0 | 6.4 | 1,126 | 9.2 | 7.5 | -594 |
| 25 to 29 | 664 | 5.0 | 4.2 | 853 | 7.0 | 6.7 | -189 |
| 30 to 34 | 895 | 6.7 | 4.2 | 807 | 6.6 | 6.6 | +88 |
| 35 to 39 | 1,136 | 8.5 | 5.5 | 773 | 6.3 | 7.5 | +363 |
| 40 to 44 | 1,058 | 7.9 | 6.4 | 921 | 7.5 | 9.4 | +137 |
| 45 to 49 | 995 | 7.4 | 6.9 | 833 | 6.8 | 5.3 | +162 |
| 50 to 54 | 984 | 7.4 | 8.9 | 744 | 6.1 | 4.1 | +240 |
| 55 to 59 | 785 | 5.9 | 8.5 | 736 | 6.0 | 5.4 | +49 |
| 60 to 64 | 802 | 6.0 | 6.4 | 732 | 6.0 | 5.0 | +70 |
| 65 to 69 | 687 | 5.1 | 5.7 | 624 | 5.1 | 7.2 | +63 |
| 70 to 74 | 651 | 4.9 | 5.3 | 451 | 3.7 | 5.3 | +200 |
| 75 to 79 | 510 | 3.8 | 3.1 | 317 | 2.6 | 4.2 | +193 |
| 80 to 84 | 362 | 2.7 | 2.8 | 137 | 1.1 | 2.1 | +225 |
| 85 and over | 386 | 2.9 | 2.2 | 90 | 0.7 | 1.6 | +296 |
| Total population | 13,370 | 100.0 | 100.0 | 12,227 | 100.0 | 100.0 | +1,143 |
Dominant groups
Analysis of the five year age groups of Altona - Seaholme in 2021 compared to Williamstown North - The Rifle Range shows that there was a higher proportion of people in the younger age groups (under 15) and a similar proportion of people in the older age groups (65+).
Overall, 17.6% of the population was aged between 0 and 15, and 19.4% were aged 65 years and over, compared with 15.7% and 19.2% respectively for Williamstown North - The Rifle Range.
The major differences between the age structure of Altona - Seaholme and Williamstown North - The Rifle Range were:
- A larger percentage of persons aged 35 to 39 (8.5% compared to 5.5%)
- A larger percentage of persons aged 30 to 34 (6.7% compared to 4.2%)
- A smaller percentage of persons aged 15 to 19 (4.2% compared to 7.7%)
- A smaller percentage of persons aged 55 to 59 (5.9% compared to 8.5%)
Emerging groups
From 1991 to 2021, Altona - Seaholme's population increased by 1,143 people (9.3%). 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:
- 20 to 24 (-594 persons)
- 15 to 19 (-397 persons)
- 35 to 39 (+363 persons)
- 85 and over (+296 persons)
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