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 Seacombe Gardens, accounting for 19.8% (669 people). This share was lower than Marion (C) (20.2%). Since 2016, the biggest change was in Parents and homebuilders (35 to 49), which increased by 143 people and 2.3 percentage points.
Section overview
Age structure - Service age groups
Seacombe Gardens - Total persons (Usual residence)
This table summarises service age groups for Seacombe Gardens in 2021 for persons, with comparison against Marion (C) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Seacombe Gardens, with comparison markers for Marion (C).
Babies and pre-schoolers (0 to 4)
2021 count
187
% of total
5.5%
Change from 2016
-1.6pp
187
5.5%
-1.6pp
Primary schoolers (5 to 11)
2021 count
248
% of total
7.4%
Change from 2016
+0.6pp
248
7.4%
+0.6pp
Secondary schoolers (12 to 17)
2021 count
174
% of total
5.2%
Change from 2016
+0.2pp
174
5.2%
+0.2pp
Tertiary education and independence (18 to 24)
2021 count
364
% of total
10.8%
Change from 2016
+0.9pp
364
10.8%
+0.9pp
Young workforce (25 to 34)
2021 count
650
% of total
19.3%
Change from 2016
+0.2pp
650
19.3%
+0.2pp
Parents and homebuilders (35 to 49)
2021 count
669
% of total
19.8%
Change from 2016
+2.3pp
669
19.8%
+2.3pp
Older workers and pre-retirees (50 to 59)
2021 count
338
% of total
10.0%
Change from 2016
-1.6pp
338
10.0%
-1.6pp
Empty nesters and retirees (60 to 69)
2021 count
343
% of total
10.2%
Change from 2016
-1.0pp
343
10.2%
-1.0pp
Seniors (70 to 84)
2021 count
333
% of total
9.9%
Change from 2016
0.0pp
333
9.9%
0.0pp
Elderly aged (85 and over)
2021 count
79
% of total
2.3%
Change from 2016
-0.1pp
79
2.3%
-0.1pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
-28
-1.6pp
Primary schoolers (5 to 11)
+43
+0.6pp
Secondary schoolers (12 to 17)
+23
+0.2pp
Tertiary education and independence (18 to 24)
+67
+0.9pp
Young workforce (25 to 34)
+75
+0.2pp
Parents and homebuilders (35 to 49)
+143
+2.3pp
Older workers and pre-retirees (50 to 59)
-11
-1.6pp
Empty nesters and retirees (60 to 69)
+6
-1.0pp
Seniors (70 to 84)
+34
0.0pp
Elderly aged (85 and over)
+8
-0.1pp
Data table
Service age groups for Seacombe Gardens. Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Marion (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Marion (C)% | Count | % | Marion (C)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 187 | 5.5% | 5.4% | 215 | 7.1% | 5.9% | -28 | -1.6pp |
| Primary schoolers (5 to 11) | 248 | 7.4% | 7.7% | 205 | 6.8% | 7.4% | +43 | +0.6pp |
| Secondary schoolers (12 to 17) | 174 | 5.2% | 6.1% | 151 | 5.0% | 6.1% | +23 | +0.2pp |
| Tertiary education and independence (18 to 24) | 364 | 10.8% | 8.8% | 297 | 9.9% | 9.6% | +67 | +0.9pp |
| Young workforce (25 to 34) | 650 | 19.3% | 15.1% | 575 | 19.1% | 14.8% | +75 | +0.2pp |
| Parents and homebuilders (35 to 49) | 669 | 19.8% | 20.2% | 526 | 17.5% | 19.5% | +143 | +2.3pp |
| Older workers and pre-retirees (50 to 59) | 338 | 10.0% | 11.7% | 349 | 11.6% | 13.0% | -11 | -1.6pp |
| Empty nesters and retirees (60 to 69) | 343 | 10.2% | 11.8% | 337 | 11.2% | 11.4% | +6 | -1.0pp |
| Seniors (70 to 84) | 333 | 9.9% | 10.4% | 299 | 9.9% | 9.1% | +34 | 0.0pp |
| Elderly aged (85 and over) | 79 | 2.3% | 2.9% | 71 | 2.4% | 3.1% | +8 | -0.1pp |
| Total | 3,373 | 100.0% | 100.0% | 3,007 | 100.0% | 100.0% | +366 | 0.0pp |