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 Whyalla Jenkins, accounting for 21.3% (417 people). This share was higher than Whyalla (C) (17.7%). Since 2016, the biggest change was in Parents and homebuilders (35 to 49), which increased by 417 people and 21.3 percentage points.
Section overview
Age structure - Service age groups
Whyalla Jenkins - Total persons (Usual residence)
This table summarises service age groups for Whyalla Jenkins in 2021 for persons, with comparison against Whyalla (C) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Whyalla Jenkins, with comparison markers for Whyalla (C).
Babies and pre-schoolers (0 to 4)
2021 count
153
% of total
7.8%
Change from 2016
+7.8pp
153
7.8%
+7.8pp
Primary schoolers (5 to 11)
2021 count
205
% of total
10.5%
Change from 2016
+10.5pp
205
10.5%
+10.5pp
Secondary schoolers (12 to 17)
2021 count
157
% of total
8.0%
Change from 2016
+8.0pp
157
8.0%
+8.0pp
Tertiary education and independence (18 to 24)
2021 count
162
% of total
8.3%
Change from 2016
+8.3pp
162
8.3%
+8.3pp
Young workforce (25 to 34)
2021 count
329
% of total
16.8%
Change from 2016
+16.8pp
329
16.8%
+16.8pp
Parents and homebuilders (35 to 49)
2021 count
417
% of total
21.3%
Change from 2016
+21.3pp
417
21.3%
+21.3pp
Older workers and pre-retirees (50 to 59)
2021 count
216
% of total
11.0%
Change from 2016
+11.0pp
216
11.0%
+11.0pp
Empty nesters and retirees (60 to 69)
2021 count
148
% of total
7.5%
Change from 2016
-22.5pp
148
7.5%
-22.5pp
Seniors (70 to 84)
2021 count
143
% of total
7.3%
Change from 2016
+7.3pp
143
7.3%
+7.3pp
Elderly aged (85 and over)
2021 count
24
% of total
1.2%
Change from 2016
+1.2pp
24
1.2%
+1.2pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
+153
+7.8pp
Primary schoolers (5 to 11)
+205
+10.5pp
Secondary schoolers (12 to 17)
+157
+8.0pp
Tertiary education and independence (18 to 24)
+162
+8.3pp
Young workforce (25 to 34)
+329
+16.8pp
Parents and homebuilders (35 to 49)
+417
+21.3pp
Older workers and pre-retirees (50 to 59)
+216
+11.0pp
Empty nesters and retirees (60 to 69)
+145
-22.5pp
Seniors (70 to 84)
+143
+7.3pp
Elderly aged (85 and over)
+24
+1.2pp
Data table
Service age groups for Whyalla Jenkins. Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Whyalla (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Whyalla (C)% | Count | % | Whyalla (C)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 153 | 7.8% | 5.4% | 0 | 0.0% | 6.1% | +153 | +7.8pp |
| Primary schoolers (5 to 11) | 205 | 10.5% | 8.7% | 0 | 0.0% | 9.2% | +205 | +10.5pp |
| Secondary schoolers (12 to 17) | 157 | 8.0% | 7.5% | 0 | 0.0% | 7.9% | +157 | +8.0pp |
| Tertiary education and independence (18 to 24) | 162 | 8.3% | 7.7% | 0 | 0.0% | 8.0% | +162 | +8.3pp |
| Young workforce (25 to 34) | 329 | 16.8% | 12.7% | 0 | 0.0% | 12.7% | +329 | +16.8pp |
| Parents and homebuilders (35 to 49) | 417 | 21.3% | 17.7% | 0 | 0.0% | 19.1% | +417 | +21.3pp |
| Older workers and pre-retirees (50 to 59) | 216 | 11.0% | 14.6% | 0 | 0.0% | 14.4% | +216 | +11.0pp |
| Empty nesters and retirees (60 to 69) | 148 | 7.5% | 12.0% | 3 | 30.0% | 10.5% | +145 | -22.5pp |
| Seniors (70 to 84) | 143 | 7.3% | 11.5% | 0 | 0.0% | 10.0% | +143 | +7.3pp |
| Elderly aged (85 and over) | 24 | 1.2% | 2.1% | 0 | 0.0% | 2.0% | +24 | +1.2pp |
| Total | 1,961 | 100.0% | 100.0% | 10 | 100.0% | 100.0% | +1,951 | 0.0pp |