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LEARN MORE ABOUT .idIn 2021, the largest age group in Willoughby City was 40 to 44 year olds. The group that changed the most since 2011 was 10 to 14 year olds, increasing by 653 people.
The Age Structure of Willoughby 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 Willoughby 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 Willoughby 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 | |||||||
|---|---|---|---|---|---|---|---|
| Willoughby City - Total males (Enumerated) | 2021 | 2011 | Change | ||||
| Five year age groups (years) | Number | % | Northbridge % | Number | % | Northbridge % | 2011 to 2021 |
| 0 to 4 | 2,080 | 5.7 | 4.5 | 2,518 | 7.8 | 7.4 | -438 |
| 5 to 9 | 2,612 | 7.2 | 8.0 | 2,214 | 6.8 | 10.5 | +398 |
| 10 to 14 | 2,554 | 7.0 | 9.3 | 1,901 | 5.9 | 8.1 | +653 |
| 15 to 19 | 2,160 | 5.9 | 8.4 | 1,689 | 5.2 | 6.1 | +471 |
| 20 to 24 | 1,988 | 5.5 | 5.0 | 2,050 | 6.3 | 6.0 | -62 |
| 25 to 29 | 2,159 | 5.9 | 2.5 | 2,397 | 7.4 | 3.2 | -238 |
| 30 to 34 | 2,349 | 6.4 | 3.0 | 2,693 | 8.3 | 3.8 | -344 |
| 35 to 39 | 2,984 | 8.2 | 4.5 | 2,770 | 8.6 | 6.0 | +214 |
| 40 to 44 | 3,032 | 8.3 | 7.0 | 2,600 | 8.0 | 7.9 | +432 |
| 45 to 49 | 2,739 | 7.5 | 7.3 | 2,329 | 7.2 | 8.6 | +410 |
| 50 to 54 | 2,396 | 6.6 | 8.0 | 2,002 | 6.2 | 7.2 | +394 |
| 55 to 59 | 2,146 | 5.9 | 7.7 | 1,710 | 5.3 | 5.9 | +436 |
| 60 to 64 | 1,805 | 4.9 | 5.7 | 1,650 | 5.1 | 7.0 | +155 |
| 65 to 69 | 1,558 | 4.3 | 4.7 | 1,170 | 3.6 | 5.0 | +388 |
| 70 to 74 | 1,460 | 4.0 | 5.0 | 836 | 2.6 | 2.5 | +624 |
| 75 to 79 | 985 | 2.7 | 3.6 | 701 | 2.2 | 2.1 | +284 |
| 80 to 84 | 716 | 2.0 | 2.8 | 616 | 1.9 | 1.7 | +100 |
| 85 and over | 749 | 2.1 | 3.0 | 515 | 1.6 | 1.2 | +234 |
| Total population | 36,472 | 100.0 | 100.0 | 32,361 | 100.0 | 100.0 | +4,111 |
Dominant groups
Analysis of the male five year age groups of Willoughby City in 2021 compared to Northbridge shows that there was a lower proportion of males in the younger age groups (under 15) as well as a lower proportion of males in the older age groups (65+).
Overall, 19.9% of the male population was aged between 0 and 15, and 15.0% were aged 65 years and over, compared with 21.8% and 19.1% respectively for Northbridge.
The major differences between the male age structure of Willoughby City and Northbridge were:
- A larger percentage of males aged 35 to 39 (8.2% compared to 4.5%)
- A larger percentage of males aged 30 to 34 (6.4% compared to 3.0%)
- A larger percentage of males aged 25 to 29 (5.9% compared to 2.5%)
- A smaller percentage of males aged 15 to 19 (5.9% compared to 8.4%)
Emerging groups
From 2011 to 2021, Willoughby City's male population increased by 4,111 people (12.7%). This represents an average annual population change of 1.2% per year over the period.
The largest changes in male age structure in this area between 2011 and 2021 were in the age groups:
- 10 to 14 (+653 males)
- 70 to 74 (+624 males)
- 15 to 19 (+471 males)
- 0 to 4 (-438 males)
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