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 Hackham, accounting for 18.3% (822 people). This share was lower than Onkaparinga (C) (19.2%). Since 2016, the biggest change was in Seniors (70 to 84), which increased by 193 people and 3.1 percentage points.
Section overview
Age structure - Service age groups
Hackham - Total persons (Usual residence)
This table summarises service age groups for Hackham in 2021 for persons, with comparison against Onkaparinga (C) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Hackham, with comparison markers for Onkaparinga (C).
Babies and pre-schoolers (0 to 4)
2021 count
268
% of total
6.0%
Change from 2016
+0.2pp
268
6.0%
+0.2pp
Primary schoolers (5 to 11)
2021 count
346
% of total
7.7%
Change from 2016
-0.5pp
346
7.7%
-0.5pp
Secondary schoolers (12 to 17)
2021 count
301
% of total
6.7%
Change from 2016
0.0pp
301
6.7%
0.0pp
Tertiary education and independence (18 to 24)
2021 count
356
% of total
7.9%
Change from 2016
+0.5pp
356
7.9%
+0.5pp
Young workforce (25 to 34)
2021 count
616
% of total
13.7%
Change from 2016
+0.6pp
616
13.7%
+0.6pp
Parents and homebuilders (35 to 49)
2021 count
822
% of total
18.3%
Change from 2016
+0.6pp
822
18.3%
+0.6pp
Older workers and pre-retirees (50 to 59)
2021 count
476
% of total
10.6%
Change from 2016
-0.9pp
476
10.6%
-0.9pp
Empty nesters and retirees (60 to 69)
2021 count
520
% of total
11.6%
Change from 2016
-2.3pp
520
11.6%
-2.3pp
Seniors (70 to 84)
2021 count
635
% of total
14.1%
Change from 2016
+3.1pp
635
14.1%
+3.1pp
Elderly aged (85 and over)
2021 count
138
% of total
3.1%
Change from 2016
-0.8pp
138
3.1%
-0.8pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
+35
+0.2pp
Primary schoolers (5 to 11)
+17
-0.5pp
Secondary schoolers (12 to 17)
+32
0.0pp
Tertiary education and independence (18 to 24)
+58
+0.5pp
Young workforce (25 to 34)
+89
+0.6pp
Parents and homebuilders (35 to 49)
+111
+0.6pp
Older workers and pre-retirees (50 to 59)
+15
-0.9pp
Empty nesters and retirees (60 to 69)
-36
-2.3pp
Seniors (70 to 84)
+193
+3.1pp
Elderly aged (85 and over)
-20
-0.8pp
Data table
Service age groups for Hackham. Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Onkaparinga (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Onkaparinga (C)% | Count | % | Onkaparinga (C)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 268 | 6.0% | 5.4% | 233 | 5.8% | 6.2% | +35 | +0.2pp |
| Primary schoolers (5 to 11) | 346 | 7.7% | 8.6% | 329 | 8.2% | 8.9% | +17 | -0.5pp |
| Secondary schoolers (12 to 17) | 301 | 6.7% | 7.3% | 269 | 6.7% | 7.5% | +32 | 0.0pp |
| Tertiary education and independence (18 to 24) | 356 | 7.9% | 7.9% | 298 | 7.4% | 8.4% | +58 | +0.5pp |
| Young workforce (25 to 34) | 616 | 13.7% | 12.2% | 527 | 13.1% | 12.4% | +89 | +0.6pp |
| Parents and homebuilders (35 to 49) | 822 | 18.3% | 19.2% | 711 | 17.7% | 19.7% | +111 | +0.6pp |
| Older workers and pre-retirees (50 to 59) | 476 | 10.6% | 13.1% | 461 | 11.5% | 13.3% | +15 | -0.9pp |
| Empty nesters and retirees (60 to 69) | 520 | 11.6% | 12.3% | 556 | 13.9% | 12.4% | -36 | -2.3pp |
| Seniors (70 to 84) | 635 | 14.1% | 11.8% | 442 | 11.0% | 9.1% | +193 | +3.1pp |
| Elderly aged (85 and over) | 138 | 3.1% | 2.2% | 158 | 3.9% | 2.1% | -20 | -0.8pp |
| Total | 4,491 | 100.0% | 100.0% | 4,009 | 100.0% | 100.0% | +482 | 0.0pp |