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LEARN MORE ABOUT .idIn 2021, the largest age group in Bidwill was 5 to 9 year olds. The group that changed the most since 1991 was 0 to 4 year olds, decreasing by 321 people.
The Age Structure of Bidwill provides key insights into the level of demand for age based services and facilities such as child care. It is also an indicator of Bidwill'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 Bidwill'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 | |||||||
|---|---|---|---|---|---|---|---|
| Bidwill - Total persons (Enumerated) | 2021 | 1991 | Change | ||||
| Five year age groups (years) | Number | % | Tallawong - Rouse Hill % | Number | % | Tallawong - Rouse Hill % | 1991 to 2021 |
| 0 to 4 | 355 | 8.5 | 9.9 | 676 | 12.6 | 6.7 | -321 |
| 5 to 9 | 395 | 9.4 | 8.4 | 707 | 13.2 | 6.2 | -312 |
| 10 to 14 | 393 | 9.4 | 6.1 | 632 | 11.8 | 7.2 | -240 |
| 15 to 19 | 342 | 8.2 | 5.2 | 583 | 10.9 | 10.9 | -241 |
| 20 to 24 | 316 | 7.6 | 8.5 | 437 | 8.1 | 11.0 | -121 |
| 25 to 29 | 299 | 7.1 | 10.8 | 391 | 7.3 | 7.1 | -93 |
| 30 to 34 | 259 | 6.2 | 13.2 | 382 | 7.1 | 6.5 | -123 |
| 35 to 39 | 204 | 4.9 | 12.9 | 401 | 7.5 | 6.8 | -197 |
| 40 to 44 | 218 | 5.2 | 8.3 | 406 | 7.6 | 7.9 | -188 |
| 45 to 49 | 241 | 5.8 | 4.9 | 271 | 5.0 | 8.8 | -30 |
| 50 to 54 | 225 | 5.4 | 3.1 | 170 | 3.2 | 6.4 | +55 |
| 55 to 59 | 223 | 5.3 | 2.7 | 115 | 2.2 | 5.1 | +107 |
| 60 to 64 | 227 | 5.4 | 2.4 | 90 | 1.7 | 3.2 | +136 |
| 65 to 69 | 172 | 4.1 | 1.8 | 35 | 0.7 | 3.0 | +137 |
| 70 to 74 | 164 | 3.9 | 1.0 | 36 | 0.7 | 1.7 | +128 |
| 75 to 79 | 82 | 2.0 | 0.3 | 22 | 0.4 | 0.9 | +60 |
| 80 to 84 | 44 | 1.1 | 0.2 | 15 | 0.3 | 0.4 | +28 |
| 85 and over | 24 | 0.6 | 0.3 | 0 | -- | 0.2 | +24 |
| Total population | 4,183 | 100.0 | 100.0 | 5,374 | 100.0 | 100.0 | -1,191 |
Dominant groups
Analysis of the five year age groups of Bidwill in 2021 compared to Tallawong - Rouse Hill shows that there was a higher proportion of people in the younger age groups (under 15) as well as a higher proportion of people in the older age groups (65+).
Overall, 27.3% of the population was aged between 0 and 15, and 11.6% were aged 65 years and over, compared with 24.3% and 3.6% respectively for Tallawong - Rouse Hill.
The major differences between the age structure of Bidwill and Tallawong - Rouse Hill were:
- A larger percentage of persons aged 10 to 14 (9.4% compared to 6.1%)
- A smaller percentage of persons aged 35 to 39 (4.9% compared to 12.9%)
- A smaller percentage of persons aged 30 to 34 (6.2% compared to 13.2%)
- A smaller percentage of persons aged 25 to 29 (7.1% compared to 10.8%)
Emerging groups
From 1991 to 2021, Bidwill's population decreased by 1,191 people (22.2%). This represents an average annual population change of -0.83% per year over the period.
The largest changes in age structure in this area between 1991 and 2021 were in the age groups:
- 0 to 4 (-321 persons)
- 5 to 9 (-312 persons)
- 15 to 19 (-241 persons)
- 10 to 14 (-240 persons)
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