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LEARN MORE ABOUT .idIn 2021, the largest age group in Dee Why was 30 to 34 year olds. The group that changed the most since 2011 was 35 to 39 year olds, increasing by 479 people.
The Age Structure of Dee Why provides key insights into the level of demand for age based services and facilities such as child care. It is also an indicator of Dee Why'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 Dee Why'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 | |||||||
|---|---|---|---|---|---|---|---|
| Dee Why - Total persons (Enumerated) | 2021 | 2011 | Change | ||||
| Five year age groups (years) | Number | % | Northern Beaches Council area % | Number | % | Northern Beaches Council area % | 2011 to 2021 |
| 0 to 4 | 1,475 | 6.4 | 5.4 | 1,446 | 7.5 | 7.2 | +28 |
| 5 to 9 | 1,095 | 4.7 | 6.2 | 927 | 4.8 | 6.8 | +167 |
| 10 to 14 | 934 | 4.0 | 7.0 | 718 | 3.7 | 6.1 | +215 |
| 15 to 19 | 881 | 3.8 | 6.2 | 769 | 4.0 | 5.6 | +112 |
| 20 to 24 | 1,473 | 6.3 | 5.2 | 1,207 | 6.2 | 5.1 | +265 |
| 25 to 29 | 2,260 | 9.7 | 5.1 | 2,148 | 11.1 | 5.7 | +111 |
| 30 to 34 | 2,631 | 11.3 | 5.9 | 2,292 | 11.8 | 6.8 | +339 |
| 35 to 39 | 2,371 | 10.2 | 6.5 | 1,892 | 9.7 | 8.2 | +479 |
| 40 to 44 | 1,812 | 7.8 | 7.0 | 1,528 | 7.9 | 8.0 | +284 |
| 45 to 49 | 1,574 | 6.8 | 7.8 | 1,435 | 7.4 | 7.7 | +139 |
| 50 to 54 | 1,444 | 6.2 | 7.4 | 1,180 | 6.1 | 6.6 | +264 |
| 55 to 59 | 1,348 | 5.8 | 6.6 | 971 | 5.0 | 5.7 | +376 |
| 60 to 64 | 1,178 | 5.1 | 5.6 | 839 | 4.3 | 5.3 | +338 |
| 65 to 69 | 876 | 3.8 | 4.7 | 608 | 3.1 | 4.4 | +268 |
| 70 to 74 | 671 | 2.9 | 4.4 | 510 | 2.6 | 3.4 | +161 |
| 75 to 79 | 493 | 2.1 | 3.7 | 377 | 1.9 | 2.6 | +115 |
| 80 to 84 | 341 | 1.5 | 2.6 | 318 | 1.6 | 2.3 | +22 |
| 85 and over | 354 | 1.5 | 2.8 | 241 | 1.2 | 2.6 | +113 |
| Total population | 23,211 | 100.0 | 100.0 | 19,414 | 100.0 | 100.0 | +3,796 |
Dominant groups
Analysis of the five year age groups of Dee Why in 2021 compared to Northern Beaches Council area shows that there was a lower proportion of people in the younger age groups (under 15) as well as a lower proportion of people in the older age groups (65+).
Overall, 15.1% of the population was aged between 0 and 15, and 11.8% were aged 65 years and over, compared with 18.5% and 18.1% respectively for Northern Beaches Council area.
The major differences between the age structure of Dee Why and Northern Beaches Council area were:
- A larger percentage of persons aged 30 to 34 (11.3% compared to 5.9%)
- A larger percentage of persons aged 25 to 29 (9.7% compared to 5.1%)
- A larger percentage of persons aged 35 to 39 (10.2% compared to 6.5%)
- A smaller percentage of persons aged 10 to 14 (4.0% compared to 7.0%)
Emerging groups
From 2011 to 2021, Dee Why's population increased by 3,797 people (19.6%). This represents an average annual population change of 1.8% per year over the period.
The largest changes in age structure in this area between 2011 and 2021 were in the age groups:
- 35 to 39 (+479 persons)
- 55 to 59 (+376 persons)
- 30 to 34 (+339 persons)
- 60 to 64 (+338 persons)
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