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 Millswood, accounting for 17.3% (377 people). This share was lower than Unley (C) (19.6%). Since 2016, the biggest change was in Seniors (70 to 84), which increased by 67 people and 2.9 percentage points.
Section overview
Age structure - Service age groups
Millswood - Total persons (Usual residence)
This table summarises service age groups for Millswood in 2021 for persons, with comparison against Unley (C) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Millswood, with comparison markers for Unley (C).
Babies and pre-schoolers (0 to 4)
2021 count
78
% of total
3.6%
Change from 2016
-2.3pp
78
3.6%
-2.3pp
Primary schoolers (5 to 11)
2021 count
183
% of total
8.4%
Change from 2016
-1.3pp
183
8.4%
-1.3pp
Secondary schoolers (12 to 17)
2021 count
209
% of total
9.6%
Change from 2016
+1.2pp
209
9.6%
+1.2pp
Tertiary education and independence (18 to 24)
2021 count
199
% of total
9.2%
Change from 2016
+1.3pp
199
9.2%
+1.3pp
Young workforce (25 to 34)
2021 count
161
% of total
7.4%
Change from 2016
-0.3pp
161
7.4%
-0.3pp
Parents and homebuilders (35 to 49)
2021 count
377
% of total
17.3%
Change from 2016
-1.4pp
377
17.3%
-1.4pp
Older workers and pre-retirees (50 to 59)
2021 count
314
% of total
14.5%
Change from 2016
-1.1pp
314
14.5%
-1.1pp
Empty nesters and retirees (60 to 69)
2021 count
307
% of total
14.1%
Change from 2016
+0.7pp
307
14.1%
+0.7pp
Seniors (70 to 84)
2021 count
294
% of total
13.5%
Change from 2016
+2.9pp
294
13.5%
+2.9pp
Elderly aged (85 and over)
2021 count
37
% of total
1.7%
Change from 2016
+0.3pp
37
1.7%
+0.3pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
-49
-2.3pp
Primary schoolers (5 to 11)
-25
-1.3pp
Secondary schoolers (12 to 17)
+29
+1.2pp
Tertiary education and independence (18 to 24)
+31
+1.3pp
Young workforce (25 to 34)
-4
-0.3pp
Parents and homebuilders (35 to 49)
-23
-1.4pp
Older workers and pre-retirees (50 to 59)
-20
-1.1pp
Empty nesters and retirees (60 to 69)
+20
+0.7pp
Seniors (70 to 84)
+67
+2.9pp
Elderly aged (85 and over)
+6
+0.3pp
Data table
Service age groups for Millswood. Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Unley (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Unley (C)% | Count | % | Unley (C)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 78 | 3.6% | 4.3% | 127 | 5.9% | 4.7% | -49 | -2.3pp |
| Primary schoolers (5 to 11) | 183 | 8.4% | 7.6% | 208 | 9.7% | 7.9% | -25 | -1.3pp |
| Secondary schoolers (12 to 17) | 209 | 9.6% | 6.9% | 180 | 8.4% | 6.6% | +29 | +1.2pp |
| Tertiary education and independence (18 to 24) | 199 | 9.2% | 8.2% | 168 | 7.9% | 9.4% | +31 | +1.3pp |
| Young workforce (25 to 34) | 161 | 7.4% | 12.4% | 165 | 7.7% | 13.5% | -4 | -0.3pp |
| Parents and homebuilders (35 to 49) | 377 | 17.3% | 19.6% | 400 | 18.7% | 19.8% | -23 | -1.4pp |
| Older workers and pre-retirees (50 to 59) | 314 | 14.5% | 12.6% | 334 | 15.6% | 12.7% | -20 | -1.1pp |
| Empty nesters and retirees (60 to 69) | 307 | 14.1% | 11.9% | 287 | 13.4% | 11.9% | +20 | +0.7pp |
| Seniors (70 to 84) | 294 | 13.5% | 12.2% | 227 | 10.6% | 9.2% | +67 | +2.9pp |
| Elderly aged (85 and over) | 37 | 1.7% | 4.1% | 31 | 1.4% | 4.3% | +6 | +0.3pp |
| Total | 2,173 | 100.0% | 100.0% | 2,140 | 100.0% | 100.0% | +33 | 0.0pp |