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LEARN MORE ABOUT .idIn 2021, the largest age group in Blue Mountains City was 60 to 64 year olds. The group that changed the most since 2011 was 70 to 74 year olds, increasing by 2,225 people.
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 also an indicator of Blue Mountains 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 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 - Five year age groups | |||||||
|---|---|---|---|---|---|---|---|
| Blue Mountains City - Total persons (Usual residence) | 2021 | 2011 | Change | ||||
| Five year age groups (years) | Number | % | Campbelltown City % | Number | % | Campbelltown City % | 2011 to 2021 |
| 0 to 4 | 3,889 | 5.0 | 7.4 | 4,697 | 6.2 | 7.5 | -808 |
| 5 to 9 | 4,705 | 6.0 | 7.6 | 5,014 | 6.6 | 7.1 | -309 |
| 10 to 14 | 5,037 | 6.4 | 7.0 | 5,091 | 6.7 | 7.4 | -54 |
| 15 to 19 | 4,665 | 6.0 | 6.2 | 4,979 | 6.6 | 7.9 | -314 |
| 20 to 24 | 3,421 | 4.4 | 6.4 | 3,756 | 4.9 | 7.5 | -335 |
| 25 to 29 | 3,098 | 4.0 | 6.9 | 3,236 | 4.3 | 7.4 | -138 |
| 30 to 34 | 4,028 | 5.2 | 7.6 | 3,762 | 5.0 | 6.8 | +266 |
| 35 to 39 | 4,678 | 6.0 | 8.2 | 4,855 | 6.4 | 6.6 | -177 |
| 40 to 44 | 4,905 | 6.3 | 6.9 | 5,534 | 7.3 | 6.4 | -629 |
| 45 to 49 | 5,489 | 7.0 | 6.1 | 5,597 | 7.4 | 6.9 | -108 |
| 50 to 54 | 5,472 | 7.0 | 5.4 | 6,045 | 8.0 | 7.1 | -573 |
| 55 to 59 | 5,408 | 6.9 | 5.7 | 5,974 | 7.9 | 6.5 | -566 |
| 60 to 64 | 5,794 | 7.4 | 5.4 | 5,492 | 7.2 | 5.6 | +302 |
| 65 to 69 | 5,533 | 7.1 | 4.6 | 4,037 | 5.3 | 3.5 | +1,496 |
| 70 to 74 | 4,984 | 6.4 | 3.8 | 2,759 | 3.6 | 2.2 | +2,225 |
| 75 to 79 | 3,339 | 4.3 | 2.4 | 2,061 | 2.7 | 1.5 | +1,278 |
| 80 to 84 | 1,921 | 2.5 | 1.4 | 1,498 | 2.0 | 1.1 | +423 |
| 85 and over | 1,763 | 2.3 | 1.1 | 1,555 | 2.0 | 0.9 | +208 |
| Total population | 78,129 | 100.0 | 100.0 | 75,942 | 100.0 | 100.0 | +2,187 |
Dominant groups
Analysis of the five year age groups of Blue Mountains City in 2021 compared to Campbelltown City shows that there was a lower proportion of people in the younger age groups (under 15) and a higher proportion of people in the older age groups (65+).
Overall, 17.4% of the population was aged between 0 and 15, and 22.5% were aged 65 years and over, compared with 22.0% and 13.3% respectively for Campbelltown City.
The major differences between the age structure of Blue Mountains City and Campbelltown City were:
- A larger percentage of persons aged 70 to 74 (6.4% compared to 3.8%)
- A larger percentage of persons aged 65 to 69 (7.1% compared to 4.6%)
- A smaller percentage of persons aged 25 to 29 (4.0% compared to 6.9%)
- A smaller percentage of persons aged 30 to 34 (5.2% compared to 7.6%)
Emerging groups
From 2011 to 2021, Blue Mountains City's population increased by 2,187 people (2.9%). This represents an average annual population change of 0.28% per year over the period.
The largest changes in age structure in this area between 2011 and 2021 were in the age groups:
- 70 to 74 (+2,225 persons)
- 65 to 69 (+1,496 persons)
- 75 to 79 (+1,278 persons)
- 0 to 4 (-808 persons)
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