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LEARN MORE ABOUT .idIn 2021, the largest age group in Blacktown City was 35 to 39 year olds. The group that changed the most since 2001 was 35 to 39 year olds, increasing by 15,844 people.
The Age Structure of Blacktown City provides key insights into the level of demand for age based services and facilities such as child care. It is also an indicator of Blacktown City'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 Blacktown City'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 | |||||||
|---|---|---|---|---|---|---|---|
| Blacktown City - Total persons (Enumerated) | 2021 | 2001 | Change | ||||
| Five year age groups (years) | Number | % | Greater Sydney % | Number | % | Greater Sydney % | 2001 to 2021 |
| 0 to 4 | 29,920 | 7.5 | 6.0 | 22,185 | 8.7 | 6.7 | +7,735 |
| 5 to 9 | 31,399 | 7.9 | 6.3 | 22,216 | 8.7 | 6.8 | +9,183 |
| 10 to 14 | 28,789 | 7.3 | 6.2 | 20,074 | 7.9 | 6.7 | +8,715 |
| 15 to 19 | 24,321 | 6.1 | 5.6 | 19,550 | 7.7 | 6.9 | +4,771 |
| 20 to 24 | 26,345 | 6.6 | 6.5 | 18,539 | 7.3 | 7.1 | +7,806 |
| 25 to 29 | 27,728 | 7.0 | 7.5 | 20,069 | 7.9 | 7.9 | +7,659 |
| 30 to 34 | 31,400 | 7.9 | 8.0 | 21,135 | 8.3 | 8.1 | +10,265 |
| 35 to 39 | 36,373 | 9.2 | 7.9 | 20,529 | 8.0 | 8.0 | +15,844 |
| 40 to 44 | 30,900 | 7.8 | 7.0 | 19,002 | 7.4 | 7.7 | +11,898 |
| 45 to 49 | 25,372 | 6.4 | 6.6 | 17,135 | 6.7 | 6.9 | +8,237 |
| 50 to 54 | 22,142 | 5.6 | 6.2 | 15,928 | 6.2 | 6.5 | +6,214 |
| 55 to 59 | 20,157 | 5.1 | 5.8 | 11,225 | 4.4 | 4.9 | +8,932 |
| 60 to 64 | 17,687 | 4.5 | 5.3 | 8,262 | 3.2 | 3.9 | +9,425 |
| 65 to 69 | 14,747 | 3.7 | 4.5 | 6,612 | 2.6 | 3.2 | +8,135 |
| 70 to 74 | 12,205 | 3.1 | 3.9 | 5,508 | 2.2 | 3.0 | +6,697 |
| 75 to 79 | 7,634 | 1.9 | 2.8 | 3,862 | 1.5 | 2.6 | +3,772 |
| 80 to 84 | 4,838 | 1.2 | 2.0 | 2,049 | 0.8 | 1.7 | +2,789 |
| 85 and over | 4,375 | 1.1 | 2.0 | 1,443 | 0.6 | 1.4 | +2,932 |
| Total population | 396,332 | 100.0 | 100.0 | 255,323 | 100.0 | 100.0 | +141,009 |
Dominant groups
Analysis of the five year age groups of Blacktown City in 2021 compared to Greater Sydney 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, 22.7% of the population was aged between 0 and 15, and 11.1% 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 Blacktown City and Greater Sydney were:
- A larger percentage of persons aged 5 to 9 (7.9% compared to 6.3%)
- A larger percentage of persons aged 0 to 4 (7.5% compared to 6.0%)
- A larger percentage of persons aged 35 to 39 (9.2% compared to 7.9%)
- A larger percentage of persons aged 10 to 14 (7.3% compared to 6.2%)
Emerging groups
From 2001 to 2021, Blacktown City's population increased by 141,009 people (55.2%). This represents an average annual population change of 2.22% per year over the period.
The largest changes in age structure in this area between 2001 and 2021 were in the age groups:
- 35 to 39 (+15,844 persons)
- 40 to 44 (+11,898 persons)
- 30 to 34 (+10,265 persons)
- 60 to 64 (+9,425 persons)
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