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LEARN MORE ABOUT .idIn 2021, the largest age group in St Marys was 25 to 29 year olds. The group that changed the most since 2016 was 35 to 39 year olds, increasing by 188 people.
The Age Structure of St Marys provides key insights into the level of demand for age based services and facilities such as child care. It is also an indicator of St Marys'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 St Marys'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 | |||||||
|---|---|---|---|---|---|---|---|
| St Marys - Total persons (Enumerated) | 2021 | 2016 | Change | ||||
| Five year age groups (years) | Number | % | Penrith City % | Number | % | Penrith City % | 2016 to 2021 |
| 0 to 4 | 1,086 | 8.2 | 7.2 | 1,022 | 8.3 | 7.4 | +63 |
| 5 to 9 | 911 | 6.9 | 7.2 | 854 | 6.9 | 7.2 | +57 |
| 10 to 14 | 809 | 6.1 | 6.8 | 639 | 5.2 | 6.5 | +170 |
| 15 to 19 | 670 | 5.0 | 6.2 | 699 | 5.7 | 6.7 | -29 |
| 20 to 24 | 883 | 6.6 | 6.8 | 997 | 8.1 | 7.2 | -115 |
| 25 to 29 | 1,125 | 8.5 | 7.4 | 1,048 | 8.5 | 7.7 | +77 |
| 30 to 34 | 1,125 | 8.5 | 7.7 | 1,047 | 8.5 | 7.8 | +77 |
| 35 to 39 | 1,055 | 7.9 | 7.8 | 866 | 7.0 | 7.1 | +188 |
| 40 to 44 | 900 | 6.8 | 6.8 | 791 | 6.4 | 6.9 | +109 |
| 45 to 49 | 827 | 6.2 | 6.4 | 730 | 5.9 | 6.4 | +97 |
| 50 to 54 | 774 | 5.8 | 5.9 | 706 | 5.7 | 6.1 | +68 |
| 55 to 59 | 728 | 5.5 | 5.5 | 723 | 5.9 | 6.1 | +4 |
| 60 to 64 | 643 | 4.8 | 5.2 | 593 | 4.8 | 5.2 | +50 |
| 65 to 69 | 549 | 4.1 | 4.3 | 525 | 4.3 | 4.5 | +24 |
| 70 to 74 | 466 | 3.5 | 3.7 | 348 | 2.8 | 2.9 | +118 |
| 75 to 79 | 318 | 2.4 | 2.3 | 290 | 2.4 | 1.9 | +28 |
| 80 to 84 | 223 | 1.7 | 1.4 | 194 | 1.6 | 1.3 | +28 |
| 85 and over | 204 | 1.5 | 1.3 | 215 | 1.7 | 1.2 | -11 |
| Total population | 13,296 | 100.0 | 100.0 | 12,294 | 100.0 | 100.0 | +1,001 |
Dominant groups
Analysis of the five year age groups of St Marys in 2021 compared to Penrith City shows that there was a similar proportion of people in the younger age groups (under 15) as well as a similar proportion of people in the older age groups (65+).
Overall, 21.1% of the population was aged between 0 and 15, and 13.2% were aged 65 years and over, compared with 21.2% and 13.0% respectively for Penrith City.
The major differences between the age structure of St Marys and Penrith City were:
- A larger percentage of persons aged 25 to 29 (8.5% compared to 7.4%)
- A larger percentage of persons aged 0 to 4 (8.2% compared to 7.2%)
- A smaller percentage of persons aged 15 to 19 (5.0% compared to 6.2%)
- A smaller percentage of persons aged 10 to 14 (6.1% compared to 6.8%)
Emerging groups
From 2016 to 2021, St Marys's population increased by 1,002 people (8.2%). This represents an average annual population change of 1.58% per year over the period.
The largest changes in age structure in this area between 2016 and 2021 were in the age groups:
- 35 to 39 (+188 persons)
- 10 to 14 (+170 persons)
- 70 to 74 (+118 persons)
- 20 to 24 (-115 persons)
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