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 Heights, accounting for 22.2% (344 people). This share was higher than Marion (C) (20.2%). Since 2016, the biggest change was in Primary schoolers (5 to 11), which increased by 40 people and 2.3 percentage points.
Section overview
Age structure - Service age groups
Seacombe Heights - Total persons (Usual residence)
This table summarises service age groups for Seacombe Heights 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 Heights, with comparison markers for Marion (C).
Babies and pre-schoolers (0 to 4)
2021 count
87
% of total
5.6%
Change from 2016
-1.4pp
87
5.6%
-1.4pp
Primary schoolers (5 to 11)
2021 count
135
% of total
8.7%
Change from 2016
+2.3pp
135
8.7%
+2.3pp
Secondary schoolers (12 to 17)
2021 count
118
% of total
7.6%
Change from 2016
-0.1pp
118
7.6%
-0.1pp
Tertiary education and independence (18 to 24)
2021 count
114
% of total
7.4%
Change from 2016
-0.7pp
114
7.4%
-0.7pp
Young workforce (25 to 34)
2021 count
186
% of total
12.0%
Change from 2016
+0.4pp
186
12.0%
+0.4pp
Parents and homebuilders (35 to 49)
2021 count
344
% of total
22.2%
Change from 2016
+1.4pp
344
22.2%
+1.4pp
Older workers and pre-retirees (50 to 59)
2021 count
195
% of total
12.6%
Change from 2016
-0.3pp
195
12.6%
-0.3pp
Empty nesters and retirees (60 to 69)
2021 count
144
% of total
9.3%
Change from 2016
-1.9pp
144
9.3%
-1.9pp
Seniors (70 to 84)
2021 count
176
% of total
11.4%
Change from 2016
-0.4pp
176
11.4%
-0.4pp
Elderly aged (85 and over)
2021 count
26
% of total
1.7%
Change from 2016
-0.4pp
26
1.7%
-0.4pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
-17
-1.4pp
Primary schoolers (5 to 11)
+40
+2.3pp
Secondary schoolers (12 to 17)
+4
-0.1pp
Tertiary education and independence (18 to 24)
-7
-0.7pp
Young workforce (25 to 34)
+14
+0.4pp
Parents and homebuilders (35 to 49)
+35
+1.4pp
Older workers and pre-retirees (50 to 59)
+3
-0.3pp
Empty nesters and retirees (60 to 69)
-22
-1.9pp
Seniors (70 to 84)
0
-0.4pp
Elderly aged (85 and over)
-5
-0.4pp
Data table
Service age groups for Seacombe Heights. 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) | 87 | 5.6% | 5.4% | 104 | 7.0% | 5.9% | -17 | -1.4pp |
| Primary schoolers (5 to 11) | 135 | 8.7% | 7.7% | 95 | 6.4% | 7.4% | +40 | +2.3pp |
| Secondary schoolers (12 to 17) | 118 | 7.6% | 6.1% | 114 | 7.7% | 6.1% | +4 | -0.1pp |
| Tertiary education and independence (18 to 24) | 114 | 7.4% | 8.8% | 121 | 8.1% | 9.6% | -7 | -0.7pp |
| Young workforce (25 to 34) | 186 | 12.0% | 15.1% | 172 | 11.6% | 14.8% | +14 | +0.4pp |
| Parents and homebuilders (35 to 49) | 344 | 22.2% | 20.2% | 309 | 20.8% | 19.5% | +35 | +1.4pp |
| Older workers and pre-retirees (50 to 59) | 195 | 12.6% | 11.7% | 192 | 12.9% | 13.0% | +3 | -0.3pp |
| Empty nesters and retirees (60 to 69) | 144 | 9.3% | 11.8% | 166 | 11.2% | 11.4% | -22 | -1.9pp |
| Seniors (70 to 84) | 176 | 11.4% | 10.4% | 176 | 11.8% | 9.1% | 0 | -0.4pp |
| Elderly aged (85 and over) | 26 | 1.7% | 2.9% | 31 | 2.1% | 3.1% | -5 | -0.4pp |
| Total | 1,549 | 100.0% | 100.0% | 1,486 | 100.0% | 100.0% | +63 | 0.0pp |