Powered by .id (informed decisions) for Shire of Serpentine Jarrahdale
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LEARN MORE ABOUT .idIn 2021, the largest age group in Byford area was 0 to 4 year olds. The group that changed the most since 2016 was 35 to 39 year olds, increasing by 657 people.
The Age Structure of Byford 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 Byford 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 Byford 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 | |||||||
|---|---|---|---|---|---|---|---|
| Byford area - Total persons (Usual residence) | 2021 | 2016 | Change | ||||
| Five year age groups (years) | Number | % | Shire of Serpentine Jarrahdale % | Number | % | Shire of Serpentine Jarrahdale % | 2016 to 2021 |
| 0 to 4 | 2,013 | 10.7 | 8.6 | 1,695 | 11.4 | 8.7 | +318 |
| 5 to 9 | 1,894 | 10.1 | 8.6 | 1,360 | 9.2 | 8.2 | +533 |
| 10 to 14 | 1,538 | 8.2 | 7.7 | 1,042 | 7.0 | 7.0 | +496 |
| 15 to 19 | 1,086 | 5.8 | 6.1 | 842 | 5.7 | 6.3 | +243 |
| 20 to 24 | 968 | 5.1 | 5.4 | 1,072 | 7.2 | 6.7 | -105 |
| 25 to 29 | 1,506 | 8.0 | 6.8 | 1,642 | 11.0 | 8.2 | -137 |
| 30 to 34 | 1,952 | 10.4 | 8.4 | 1,710 | 11.5 | 8.5 | +242 |
| 35 to 39 | 1,828 | 9.7 | 8.1 | 1,171 | 7.9 | 7.1 | +657 |
| 40 to 44 | 1,308 | 7.0 | 6.7 | 936 | 6.3 | 6.8 | +372 |
| 45 to 49 | 1,018 | 5.4 | 6.1 | 797 | 5.4 | 7.1 | +221 |
| 50 to 54 | 913 | 4.9 | 6.5 | 691 | 4.7 | 6.6 | +221 |
| 55 to 59 | 786 | 4.2 | 5.8 | 601 | 4.0 | 5.5 | +184 |
| 60 to 64 | 643 | 3.4 | 4.7 | 433 | 2.9 | 4.3 | +209 |
| 65 to 69 | 487 | 2.6 | 3.6 | 376 | 2.5 | 3.7 | +110 |
| 70 to 74 | 383 | 2.0 | 3.0 | 195 | 1.3 | 2.3 | +187 |
| 75 to 79 | 209 | 1.1 | 1.8 | 156 | 1.1 | 1.6 | +53 |
| 80 to 84 | 155 | 0.8 | 1.1 | 67 | 0.5 | 0.8 | +88 |
| 85 and over | 120 | 0.6 | 0.8 | 77 | 0.5 | 0.7 | +43 |
| Total population | 18,807 | 100.0 | 100.0 | 14,872 | 100.0 | 100.0 | +3,935 |
Dominant groups
Analysis of the five year age groups of Byford area in 2021 compared to the Shire of Serpentine Jarrahdale shows that there was a higher proportion of people in the younger age groups (under 15) and a lower proportion of people in the older age groups (65+).
Overall, 29.0% of the population was aged between 0 and 15, and 7.2% were aged 65 years and over, compared with 24.9% and 10.3% respectively for the Shire of Serpentine Jarrahdale.
The major differences between the age structure of Byford area and the Shire of Serpentine Jarrahdale were:
- A larger percentage of persons aged 0 to 4 (10.7% compared to 8.6%)
- A larger percentage of persons aged 30 to 34 (10.4% compared to 8.4%)
- A smaller percentage of persons aged 50 to 54 (4.9% compared to 6.5%)
- A smaller percentage of persons aged 55 to 59 (4.2% compared to 5.8%)
Emerging groups
From 2016 to 2021, Byford area's population increased by 3,935 people (26.5%). This represents an average annual population change of 4.81% per year over the period.
The largest changes in age structure in this area between 2016 and 2021 were in the age groups:
- 35 to 39 (+657 persons)
- 5 to 9 (+533 persons)
- 10 to 14 (+496 persons)
- 40 to 44 (+372 persons)
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