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, Empty nesters and retirees (60 to 69) was the most common category among residents in Yankalilla (DC), accounting for 21.6% (1,258 people). This share was higher than Regional SA (15.1%). Since 2016, the biggest change was in Seniors (70 to 84), which increased by 344 people and 4.1 percentage points.
Section overview
Age structure - Service age groups
Yankalilla (DC) - Total persons (Usual residence)
This table summarises service age groups for Yankalilla (DC) in 2021 for persons, with comparison against Regional SA and change since 2016.
Chart view
Age structure - Service age groups snapshot
2021 distribution by category for Yankalilla (DC), with comparison markers for Regional SA.
Babies and pre-schoolers (0 to 4)
2021 count
230
% of total
3.9%
Change from 2016
0.0pp
230
3.9%
0.0pp
Primary schoolers (5 to 11)
2021 count
398
% of total
6.8%
Change from 2016
-0.5pp
398
6.8%
-0.5pp
Secondary schoolers (12 to 17)
2021 count
342
% of total
5.9%
Change from 2016
+0.4pp
342
5.9%
+0.4pp
Tertiary education and independence (18 to 24)
2021 count
258
% of total
4.4%
Change from 2016
-0.5pp
258
4.4%
-0.5pp
Young workforce (25 to 34)
2021 count
382
% of total
6.5%
Change from 2016
-0.8pp
382
6.5%
-0.8pp
Parents and homebuilders (35 to 49)
2021 count
823
% of total
14.1%
Change from 2016
-0.7pp
823
14.1%
-0.7pp
Older workers and pre-retirees (50 to 59)
2021 count
822
% of total
14.1%
Change from 2016
-2.2pp
822
14.1%
-2.2pp
Empty nesters and retirees (60 to 69)
2021 count
1,258
% of total
21.6%
Change from 2016
0.0pp
1,258
21.6%
0.0pp
Seniors (70 to 84)
2021 count
1,156
% of total
19.8%
Change from 2016
+4.1pp
1,156
19.8%
+4.1pp
Elderly aged (85 and over)
2021 count
177
% of total
3.0%
Change from 2016
+0.3pp
177
3.0%
+0.3pp
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
+28
0.0pp
Primary schoolers (5 to 11)
+19
-0.5pp
Secondary schoolers (12 to 17)
+58
+0.4pp
Tertiary education and independence (18 to 24)
+6
-0.5pp
Young workforce (25 to 34)
+6
-0.8pp
Parents and homebuilders (35 to 49)
+60
-0.7pp
Older workers and pre-retirees (50 to 59)
-18
-2.2pp
Empty nesters and retirees (60 to 69)
+145
0.0pp
Seniors (70 to 84)
+344
+4.1pp
Elderly aged (85 and over)
+39
+0.3pp
Data table
Service age groups for Yankalilla (DC). Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Regional SA.
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Regional SA% | Count | % | Regional SA% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 230 | 3.9% | 4.9% | 202 | 3.9% | 5.5% | +28 | 0.0pp |
| Primary schoolers (5 to 11) | 398 | 6.8% | 8.1% | 379 | 7.3% | 8.6% | +19 | -0.5pp |
| Secondary schoolers (12 to 17) | 342 | 5.9% | 7.0% | 284 | 5.5% | 7.2% | +58 | +0.4pp |
| Tertiary education and independence (18 to 24) | 258 | 4.4% | 6.5% | 252 | 4.9% | 6.8% | +6 | -0.5pp |
| Young workforce (25 to 34) | 382 | 6.5% | 10.5% | 376 | 7.3% | 10.4% | +6 | -0.8pp |
| Parents and homebuilders (35 to 49) | 823 | 14.1% | 16.4% | 763 | 14.8% | 17.8% | +60 | -0.7pp |
| Older workers and pre-retirees (50 to 59) | 822 | 14.1% | 13.9% | 840 | 16.3% | 14.6% | -18 | -2.2pp |
| Empty nesters and retirees (60 to 69) | 1,258 | 21.6% | 15.1% | 1,113 | 21.6% | 14.4% | +145 | 0.0pp |
| Seniors (70 to 84) | 1,156 | 19.8% | 14.7% | 812 | 15.7% | 12.1% | +344 | +4.1pp |
| Elderly aged (85 and over) | 177 | 3.0% | 2.8% | 138 | 2.7% | 2.7% | +39 | +0.3pp |
| Total | 5,834 | 100.0% | 100.0% | 5,159 | 100.0% | 100.0% | +675 | 0.0pp |