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LEARN MORE ABOUT .idIn 2021, Blue Mountains City had lower proportion of children (under 18) and a higher proportion of persons aged 60 or older than Blacktown City.
The Age Structure of Blue Mountains City provides key insights into the level of demand for age based services and facilities such as child care. It is an indicator of Blue Mountains City's residential role and function and how it is likely to change in the future.
Service age groups divide the population into age categories that reflect typical life-stages. They indicate the level of demand for services that target people at different stages in life and how that demand is changing.
To get a more complete picture Blue Mountains 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 - Service age groups | |||||||
|---|---|---|---|---|---|---|---|
| Blue Mountains City - Total persons (Enumerated) | 2021 | 1991 | Change | ||||
| Service age group (years) | Number | % | Blacktown City % | Number | % | Blacktown City % | 1991 to 2021 |
| Babies and pre-schoolers (0 to 4) | 3,884 | 5.0 | 7.5 | 5,812 | 8.7 | 9.3 | -1,928 |
| Primary schoolers (5 to 11) | 6,668 | 8.6 | 11.0 | 8,340 | 12.5 | 12.7 | -1,672 |
| Secondary schoolers (12 to 17) | 6,058 | 7.8 | 8.0 | 6,587 | 9.9 | 10.3 | -529 |
| Tertiary education and independence (18 to 24) | 5,074 | 6.5 | 9.0 | 5,900 | 8.9 | 12.3 | -826 |
| Young workforce (25 to 34) | 7,111 | 9.1 | 14.9 | 10,117 | 15.2 | 16.9 | -3,006 |
| Parents and homebuilders (35 to 49) | 15,039 | 19.3 | 23.4 | 16,147 | 24.3 | 21.5 | -1,108 |
| Older workers and pre-retirees (50 to 59) | 10,868 | 13.9 | 10.7 | 5,664 | 8.5 | 8.0 | +5,204 |
| Empty nesters and retirees (60 to 69) | 11,280 | 14.5 | 8.2 | 2,649 | 4.0 | 5.5 | +8,631 |
| Seniors (70 to 84) | 10,180 | 13.1 | 6.2 | 4,806 | 7.2 | 3.1 | +5,374 |
| Elderly aged (85 and over) | 1,747 | 2.2 | 1.1 | 472 | 0.7 | 0.3 | +1,275 |
| Total | 77,909 | 100.0 | 100.0 | 66,494 | 100.0 | 100.0 | +11,415 |
Dominant groups
Analysis of the service age groups of Blue Mountains City in 2021 compared to Blacktown City shows that there was a lower proportion of people in the younger age groups (0 to 17 years) and a higher proportion of people in the older age groups (60+ years).
Overall, 21.3% of the population was aged between 0 and 17, and 29.8% were aged 60 years and over, compared with 26.5% and 15.5% respectively for Blacktown City.
The major differences between the age structure of Blue Mountains City and Blacktown City were:
- A larger percentage of 'Seniors' (13.1% compared to 6.2%)
- A larger percentage of 'Empty nesters and retirees' (14.5% compared to 8.2%)
- A smaller percentage of 'Young workforce' (9.1% compared to 14.9%)
- A smaller percentage of 'Parents and homebuilders' (19.3% compared to 23.4%)
Emerging groups
From 1991 to 2021, Blue Mountains City's population increased by 11,415 people (17.2%). This represents an average annual population change of 0.53% per year over the period.
The largest changes in the age structure in this area between 1991 and 2021 were in the age groups:
- Empty nesters and retirees (60 to 69) (+8,631 people)
- Seniors (70 to 84) (+5,374 people)
- Older workers and pre-retirees (50 to 59) (+5,204 people)
- Young workforce (25 to 34) (-3,006 people)
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