Population
Service age groups
About this topic
Service age groups divide the population into broad life-stage bands such as children, young adults, working-age adults, and older people. The groupings are designed to reflect typical demand for age-based services and facilities rather than exact five-year cohorts.
This view is useful for planning childcare, schools, recreation, aged services, and other community infrastructure. It works best alongside five year age groups, household type, and dwelling data, which add more detail about who is living in an area and how needs may change over time.
Interpretation notes
- This is a derived grouping rather than a direct Census question, so the age bands are planning-oriented summaries built from standard age data.
- Percentages relate to the total population; use five year age groups when exact cohort detail matters.
Related topics
Key insight
In 2021, Parents and homebuilders (35 to 49) was the most common category among residents in Santa Teresa, accounting for 21.5% (131 people). This share was lower than MacDonnell (R) (22.7%). Since 2016, the biggest change was in Parents and homebuilders (35 to 49), which increased by 37 people and 5.3 percentage points.
Section overview
Age structure - Service age groups
Santa Teresa - Total persons (Usual residence)
This table summarises service age groups for Santa Teresa in 2021 for persons, with comparison against MacDonnell (R) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Santa Teresa, with comparison markers for MacDonnell (R).
Babies and pre-schoolers (0 to 4)
2021 count
53
% of total
8.7%
Change from 2016
-1.3pp
53
8.7%
-1.3pp
Primary schoolers (5 to 11)
2021 count
90
% of total
14.8%
Change from 2016
+0.6pp
90
14.8%
+0.6pp
Secondary schoolers (12 to 17)
2021 count
64
% of total
10.5%
Change from 2016
-4.0pp
64
10.5%
-4.0pp
Tertiary education and independence (18 to 24)
2021 count
64
% of total
10.5%
Change from 2016
+2.7pp
64
10.5%
+2.7pp
Young workforce (25 to 34)
2021 count
87
% of total
14.3%
Change from 2016
-1.2pp
87
14.3%
-1.2pp
Parents and homebuilders (35 to 49)
2021 count
131
% of total
21.5%
Change from 2016
+5.3pp
131
21.5%
+5.3pp
Older workers and pre-retirees (50 to 59)
2021 count
38
% of total
6.2%
Change from 2016
-1.2pp
38
6.2%
-1.2pp
Empty nesters and retirees (60 to 69)
2021 count
32
% of total
5.3%
Change from 2016
+0.1pp
32
5.3%
+0.1pp
Seniors (70 to 84)
2021 count
17
% of total
2.8%
Change from 2016
-0.5pp
17
2.8%
-0.5pp
Elderly aged (85 and over)
2021 count
3
% of total
0.5%
Change from 2016
0.0pp
3
0.5%
0.0pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
-5
-1.3pp
Primary schoolers (5 to 11)
+8
+0.6pp
Secondary schoolers (12 to 17)
-20
-4.0pp
Tertiary education and independence (18 to 24)
+19
+2.7pp
Young workforce (25 to 34)
-3
-1.2pp
Parents and homebuilders (35 to 49)
+37
+5.3pp
Older workers and pre-retirees (50 to 59)
-5
-1.2pp
Empty nesters and retirees (60 to 69)
+2
+0.1pp
Seniors (70 to 84)
-2
-0.5pp
Elderly aged (85 and over)
0
0.0pp
Data table
Service age groups for Santa Teresa. Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with MacDonnell (R).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | MacDonnell (R)% | Count | % | MacDonnell (R)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 53 | 8.7% | 7.6% | 58 | 10.0% | 6.9% | -5 | -1.3pp |
| Primary schoolers (5 to 11) | 90 | 14.8% | 10.7% | 82 | 14.2% | 9.9% | +8 | +0.6pp |
| Secondary schoolers (12 to 17) | 64 | 10.5% | 7.9% | 84 | 14.5% | 8.3% | -20 | -4.0pp |
| Tertiary education and independence (18 to 24) | 64 | 10.5% | 12.4% | 45 | 7.8% | 17.3% | +19 | +2.7pp |
| Young workforce (25 to 34) | 87 | 14.3% | 19.2% | 90 | 15.5% | 18.6% | -3 | -1.2pp |
| Parents and homebuilders (35 to 49) | 131 | 21.5% | 22.7% | 94 | 16.2% | 20.7% | +37 | +5.3pp |
| Older workers and pre-retirees (50 to 59) | 38 | 6.2% | 10.3% | 43 | 7.4% | 10.1% | -5 | -1.2pp |
| Empty nesters and retirees (60 to 69) | 32 | 5.3% | 6.2% | 30 | 5.2% | 5.4% | +2 | +0.1pp |
| Seniors (70 to 84) | 17 | 2.8% | 2.7% | 19 | 3.3% | 2.3% | -2 | -0.5pp |
| Elderly aged (85 and over) | 3 | 0.5% | 0.2% | 3 | 0.5% | 0.3% | 0 | 0.0pp |
| Total | 609 | 100.0% | 100.0% | 579 | 100.0% | 100.0% | +30 | 0.0pp |