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 Marino, accounting for 19% (433 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 424 people and 10.1 percentage points.
Section overview
Age structure - Service age groups
Marino - Total persons (Usual residence)
This table summarises service age groups for Marino in 2021 for persons, with comparison against Marion (C) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Marino, with comparison markers for Marion (C).
Babies and pre-schoolers (0 to 4)
2021 count
98
% of total
4.3%
Change from 2016
+1.3pp
98
4.3%
+1.3pp
Primary schoolers (5 to 11)
2021 count
166
% of total
7.3%
Change from 2016
-1.6pp
166
7.3%
-1.6pp
Secondary schoolers (12 to 17)
2021 count
171
% of total
7.5%
Change from 2016
+4.5pp
171
7.5%
+4.5pp
Tertiary education and independence (18 to 24)
2021 count
166
% of total
7.3%
Change from 2016
+4.3pp
166
7.3%
+4.3pp
Young workforce (25 to 34)
2021 count
154
% of total
6.8%
Change from 2016
-18.9pp
154
6.8%
-18.9pp
Parents and homebuilders (35 to 49)
2021 count
433
% of total
19.0%
Change from 2016
+10.1pp
433
19.0%
+10.1pp
Older workers and pre-retirees (50 to 59)
2021 count
351
% of total
15.4%
Change from 2016
+2.5pp
351
15.4%
+2.5pp
Empty nesters and retirees (60 to 69)
2021 count
335
% of total
14.7%
Change from 2016
+2.8pp
335
14.7%
+2.8pp
Seniors (70 to 84)
2021 count
325
% of total
14.3%
Change from 2016
+8.4pp
325
14.3%
+8.4pp
Elderly aged (85 and over)
2021 count
46
% of total
2.0%
Change from 2016
+2.0pp
46
2.0%
+2.0pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
+95
+1.3pp
Primary schoolers (5 to 11)
+157
-1.6pp
Secondary schoolers (12 to 17)
+168
+4.5pp
Tertiary education and independence (18 to 24)
+163
+4.3pp
Young workforce (25 to 34)
+128
-18.9pp
Parents and homebuilders (35 to 49)
+424
+10.1pp
Older workers and pre-retirees (50 to 59)
+338
+2.5pp
Empty nesters and retirees (60 to 69)
+323
+2.8pp
Seniors (70 to 84)
+319
+8.4pp
Elderly aged (85 and over)
+46
+2.0pp
Data table
Service age groups for Marino. 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) | 98 | 4.3% | 5.4% | 3 | 3.0% | 5.9% | +95 | +1.3pp |
| Primary schoolers (5 to 11) | 166 | 7.3% | 7.7% | 9 | 8.9% | 7.4% | +157 | -1.6pp |
| Secondary schoolers (12 to 17) | 171 | 7.5% | 6.1% | 3 | 3.0% | 6.1% | +168 | +4.5pp |
| Tertiary education and independence (18 to 24) | 166 | 7.3% | 8.8% | 3 | 3.0% | 9.6% | +163 | +4.3pp |
| Young workforce (25 to 34) | 154 | 6.8% | 15.1% | 26 | 25.7% | 14.8% | +128 | -18.9pp |
| Parents and homebuilders (35 to 49) | 433 | 19.0% | 20.2% | 9 | 8.9% | 19.5% | +424 | +10.1pp |
| Older workers and pre-retirees (50 to 59) | 351 | 15.4% | 11.7% | 13 | 12.9% | 13.0% | +338 | +2.5pp |
| Empty nesters and retirees (60 to 69) | 335 | 14.7% | 11.8% | 12 | 11.9% | 11.4% | +323 | +2.8pp |
| Seniors (70 to 84) | 325 | 14.3% | 10.4% | 6 | 5.9% | 9.1% | +319 | +8.4pp |
| Elderly aged (85 and over) | 46 | 2.0% | 2.9% | 0 | 0.0% | 3.1% | +46 | +2.0pp |
| Total | 2,277 | 100.0% | 100.0% | 101 | 100.0% | 100.0% | +2,176 | 0.0pp |