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 Plympton Park, accounting for 21.2% (823 people). This share was higher than Marion (C) (20.2%). Since 2016, the biggest change was in Parents and homebuilders (35 to 49), which increased by 188 people and 1.6 percentage points.
Section overview
Age structure - Service age groups
Plympton Park - Total persons (Usual residence)
This table summarises service age groups for Plympton Park in 2021 for persons, with comparison against Marion (C) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Plympton Park, with comparison markers for Marion (C).
Babies and pre-schoolers (0 to 4)
2021 count
262
% of total
6.8%
Change from 2016
+0.1pp
262
6.8%
+0.1pp
Primary schoolers (5 to 11)
2021 count
278
% of total
7.2%
Change from 2016
0.0pp
278
7.2%
0.0pp
Secondary schoolers (12 to 17)
2021 count
198
% of total
5.1%
Change from 2016
+0.4pp
198
5.1%
+0.4pp
Tertiary education and independence (18 to 24)
2021 count
374
% of total
9.6%
Change from 2016
+0.1pp
374
9.6%
+0.1pp
Young workforce (25 to 34)
2021 count
707
% of total
18.2%
Change from 2016
-1.2pp
707
18.2%
-1.2pp
Parents and homebuilders (35 to 49)
2021 count
823
% of total
21.2%
Change from 2016
+1.6pp
823
21.2%
+1.6pp
Older workers and pre-retirees (50 to 59)
2021 count
443
% of total
11.4%
Change from 2016
-1.2pp
443
11.4%
-1.2pp
Empty nesters and retirees (60 to 69)
2021 count
417
% of total
10.7%
Change from 2016
+0.8pp
417
10.7%
+0.8pp
Seniors (70 to 84)
2021 count
289
% of total
7.4%
Change from 2016
-0.3pp
289
7.4%
-0.3pp
Elderly aged (85 and over)
2021 count
86
% of total
2.2%
Change from 2016
-1.1pp
86
2.2%
-1.1pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
+46
+0.1pp
Primary schoolers (5 to 11)
+43
0.0pp
Secondary schoolers (12 to 17)
+47
+0.4pp
Tertiary education and independence (18 to 24)
+65
+0.1pp
Young workforce (25 to 34)
+78
-1.2pp
Parents and homebuilders (35 to 49)
+188
+1.6pp
Older workers and pre-retirees (50 to 59)
+35
-1.2pp
Empty nesters and retirees (60 to 69)
+97
+0.8pp
Seniors (70 to 84)
+39
-0.3pp
Elderly aged (85 and over)
-22
-1.1pp
Data table
Service age groups for Plympton Park. 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) | 262 | 6.8% | 5.4% | 216 | 6.7% | 5.9% | +46 | +0.1pp |
| Primary schoolers (5 to 11) | 278 | 7.2% | 7.7% | 235 | 7.2% | 7.4% | +43 | 0.0pp |
| Secondary schoolers (12 to 17) | 198 | 5.1% | 6.1% | 151 | 4.7% | 6.1% | +47 | +0.4pp |
| Tertiary education and independence (18 to 24) | 374 | 9.6% | 8.8% | 309 | 9.5% | 9.6% | +65 | +0.1pp |
| Young workforce (25 to 34) | 707 | 18.2% | 15.1% | 629 | 19.4% | 14.8% | +78 | -1.2pp |
| Parents and homebuilders (35 to 49) | 823 | 21.2% | 20.2% | 635 | 19.6% | 19.5% | +188 | +1.6pp |
| Older workers and pre-retirees (50 to 59) | 443 | 11.4% | 11.7% | 408 | 12.6% | 13.0% | +35 | -1.2pp |
| Empty nesters and retirees (60 to 69) | 417 | 10.7% | 11.8% | 320 | 9.9% | 11.4% | +97 | +0.8pp |
| Seniors (70 to 84) | 289 | 7.4% | 10.4% | 250 | 7.7% | 9.1% | +39 | -0.3pp |
| Elderly aged (85 and over) | 86 | 2.2% | 2.9% | 108 | 3.3% | 3.1% | -22 | -1.1pp |
| Total | 3,881 | 100.0% | 100.0% | 3,247 | 100.0% | 100.0% | +634 | 0.0pp |