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LEARN MORE ABOUT .idIn 2021, the largest age group in Reservoir (Oakhill) was 30 to 34 year olds. The group that changed the most since 2011 was 30 to 34 year olds, increasing by 424 people.
The Age Structure of Reservoir (Oakhill) provides key insights into the level of demand for age based services and facilities such as child care. It is also an indicator of Reservoir (Oakhill)'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 Reservoir (Oakhill)'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 | |||||||
|---|---|---|---|---|---|---|---|
| Reservoir (Oakhill) - Total persons (Enumerated) | 2021 | 2011 | Change | ||||
| Five year age groups (years) | Number | % | City of Darebin % | Number | % | City of Darebin % | 2011 to 2021 |
| 0 to 4 | 696 | 5.4 | 5.3 | 692 | 6.0 | 6.5 | +4 |
| 5 to 9 | 618 | 4.8 | 5.0 | 555 | 4.8 | 5.3 | +63 |
| 10 to 14 | 561 | 4.4 | 4.8 | 564 | 4.9 | 4.5 | -3 |
| 15 to 19 | 577 | 4.5 | 4.6 | 565 | 4.9 | 4.9 | +12 |
| 20 to 24 | 857 | 6.7 | 6.4 | 926 | 8.0 | 8.0 | -69 |
| 25 to 29 | 1,170 | 9.1 | 9.2 | 1,035 | 9.0 | 9.5 | +134 |
| 30 to 34 | 1,260 | 9.8 | 10.0 | 835 | 7.2 | 9.1 | +424 |
| 35 to 39 | 1,087 | 8.5 | 8.8 | 827 | 7.2 | 8.5 | +260 |
| 40 to 44 | 799 | 6.2 | 7.3 | 846 | 7.3 | 8.1 | -48 |
| 45 to 49 | 774 | 6.0 | 6.9 | 702 | 6.1 | 6.6 | +71 |
| 50 to 54 | 815 | 6.4 | 6.8 | 688 | 6.0 | 5.8 | +126 |
| 55 to 59 | 691 | 5.4 | 5.6 | 597 | 5.2 | 4.8 | +94 |
| 60 to 64 | 635 | 5.0 | 4.8 | 527 | 4.6 | 4.1 | +107 |
| 65 to 69 | 563 | 4.4 | 3.8 | 446 | 3.9 | 3.4 | +116 |
| 70 to 74 | 495 | 3.9 | 3.3 | 394 | 3.4 | 3.3 | +101 |
| 75 to 79 | 371 | 2.9 | 2.6 | 431 | 3.7 | 3.0 | -60 |
| 80 to 84 | 339 | 2.6 | 2.3 | 453 | 3.9 | 2.5 | -114 |
| 85 and over | 512 | 4.0 | 2.6 | 456 | 4.0 | 2.2 | +56 |
| Total population | 12,820 | 100.0 | 100.0 | 11,547 | 100.0 | 100.0 | +1,273 |
Dominant groups
Analysis of the five year age groups of Reservoir (Oakhill) in 2021 compared to the City of Darebin shows that there was a similar proportion of people in the younger age groups (under 15) and a higher proportion of people in the older age groups (65+).
Overall, 14.6% of the population was aged between 0 and 15, and 17.8% were aged 65 years and over, compared with 15.0% and 14.7% respectively for the City of Darebin.
The major differences between the age structure of Reservoir (Oakhill) and the City of Darebin were:
- A larger percentage of persons aged 85 and over (4.0% compared to 2.6%)
- A larger percentage of persons aged 70 to 74 (3.9% compared to 3.3%)
- A smaller percentage of persons aged 40 to 44 (6.2% compared to 7.3%)
- A smaller percentage of persons aged 45 to 49 (6.0% compared to 6.9%)
Emerging groups
From 2011 to 2021, Reservoir (Oakhill)'s population increased by 1,273 people (11.0%). This represents an average annual population change of 1.05% per year over the period.
The largest changes in age structure in this area between 2011 and 2021 were in the age groups:
- 30 to 34 (+424 persons)
- 35 to 39 (+260 persons)
- 25 to 29 (+134 persons)
- 50 to 54 (+126 persons)
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