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, Seniors (70 to 84) was the most common category among residents in Yorke Peninsula (DC), accounting for 21.7% (2,518 people). This share was higher than Regional SA (14.7%). Since 2016, the biggest change was in Seniors (70 to 84), which increased by 529 people and 3.7 percentage points.
Section overview
Age structure - Service age groups
Yorke Peninsula (DC) - Total persons (Usual residence)
This table summarises service age groups for Yorke Peninsula (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 Yorke Peninsula (DC), with comparison markers for Regional SA.
Babies and pre-schoolers (0 to 4)
2021 count
475
% of total
4.1%
Change from 2016
0.0pp
475
4.1%
0.0pp
Primary schoolers (5 to 11)
2021 count
732
% of total
6.3%
Change from 2016
-0.7pp
732
6.3%
-0.7pp
Secondary schoolers (12 to 17)
2021 count
618
% of total
5.3%
Change from 2016
-0.5pp
618
5.3%
-0.5pp
Tertiary education and independence (18 to 24)
2021 count
498
% of total
4.3%
Change from 2016
+0.1pp
498
4.3%
+0.1pp
Young workforce (25 to 34)
2021 count
854
% of total
7.4%
Change from 2016
+0.2pp
854
7.4%
+0.2pp
Parents and homebuilders (35 to 49)
2021 count
1,467
% of total
12.6%
Change from 2016
-1.0pp
1,467
12.6%
-1.0pp
Older workers and pre-retirees (50 to 59)
2021 count
1,660
% of total
14.3%
Change from 2016
-1.9pp
1,660
14.3%
-1.9pp
Empty nesters and retirees (60 to 69)
2021 count
2,360
% of total
20.3%
Change from 2016
+0.2pp
2,360
20.3%
+0.2pp
Seniors (70 to 84)
2021 count
2,518
% of total
21.7%
Change from 2016
+3.7pp
2,518
21.7%
+3.7pp
Elderly aged (85 and over)
2021 count
428
% of total
3.7%
Change from 2016
-0.5pp
428
3.7%
-0.5pp
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
+23
0.0pp
Primary schoolers (5 to 11)
-37
-0.7pp
Secondary schoolers (12 to 17)
-20
-0.5pp
Tertiary education and independence (18 to 24)
+34
+0.1pp
Young workforce (25 to 34)
+62
+0.2pp
Parents and homebuilders (35 to 49)
-42
-1.0pp
Older workers and pre-retirees (50 to 59)
-127
-1.9pp
Empty nesters and retirees (60 to 69)
+143
+0.2pp
Seniors (70 to 84)
+529
+3.7pp
Elderly aged (85 and over)
-36
-0.5pp
Data table
Service age groups for Yorke Peninsula (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) | 475 | 4.1% | 4.9% | 452 | 4.1% | 5.5% | +23 | 0.0pp |
| Primary schoolers (5 to 11) | 732 | 6.3% | 8.1% | 769 | 7.0% | 8.6% | -37 | -0.7pp |
| Secondary schoolers (12 to 17) | 618 | 5.3% | 7.0% | 638 | 5.8% | 7.2% | -20 | -0.5pp |
| Tertiary education and independence (18 to 24) | 498 | 4.3% | 6.5% | 464 | 4.2% | 6.8% | +34 | +0.1pp |
| Young workforce (25 to 34) | 854 | 7.4% | 10.5% | 792 | 7.2% | 10.4% | +62 | +0.2pp |
| Parents and homebuilders (35 to 49) | 1,467 | 12.6% | 16.4% | 1,509 | 13.6% | 17.8% | -42 | -1.0pp |
| Older workers and pre-retirees (50 to 59) | 1,660 | 14.3% | 13.9% | 1,787 | 16.2% | 14.6% | -127 | -1.9pp |
| Empty nesters and retirees (60 to 69) | 2,360 | 20.3% | 15.1% | 2,217 | 20.1% | 14.4% | +143 | +0.2pp |
| Seniors (70 to 84) | 2,518 | 21.7% | 14.7% | 1,989 | 18.0% | 12.1% | +529 | +3.7pp |
| Elderly aged (85 and over) | 428 | 3.7% | 2.8% | 464 | 4.2% | 2.7% | -36 | -0.5pp |
| Total | 11,598 | 100.0% | 100.0% | 11,056 | 100.0% | 100.0% | +542 | 0.0pp |