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 Ceduna (DC), accounting for 16.9% (593 people). This share was higher than Regional SA (16.4%). Since 2016, the biggest change was in Seniors (70 to 84), which increased by 97 people and 2.5 percentage points.
Section overview
Age structure - Service age groups
Ceduna (DC) - Total persons (Usual residence)
This table summarises service age groups for Ceduna (DC) in 2021 for persons, with comparison against Regional SA and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Ceduna (DC), with comparison markers for Regional SA.
Babies and pre-schoolers (0 to 4)
2021 count
233
% of total
6.6%
Change from 2016
-0.7pp
233
6.6%
-0.7pp
Primary schoolers (5 to 11)
2021 count
343
% of total
9.8%
Change from 2016
+0.4pp
343
9.8%
+0.4pp
Secondary schoolers (12 to 17)
2021 count
224
% of total
6.4%
Change from 2016
-2.0pp
224
6.4%
-2.0pp
Tertiary education and independence (18 to 24)
2021 count
259
% of total
7.4%
Change from 2016
-0.5pp
259
7.4%
-0.5pp
Young workforce (25 to 34)
2021 count
467
% of total
13.3%
Change from 2016
+1.1pp
467
13.3%
+1.1pp
Parents and homebuilders (35 to 49)
2021 count
593
% of total
16.9%
Change from 2016
-2.4pp
593
16.9%
-2.4pp
Older workers and pre-retirees (50 to 59)
2021 count
488
% of total
13.9%
Change from 2016
+1.2pp
488
13.9%
+1.2pp
Empty nesters and retirees (60 to 69)
2021 count
454
% of total
13.0%
Change from 2016
+0.3pp
454
13.0%
+0.3pp
Seniors (70 to 84)
2021 count
383
% of total
10.9%
Change from 2016
+2.5pp
383
10.9%
+2.5pp
Elderly aged (85 and over)
2021 count
47
% of total
1.3%
Change from 2016
-0.6pp
47
1.3%
-0.6pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
-15
-0.7pp
Primary schoolers (5 to 11)
+22
+0.4pp
Secondary schoolers (12 to 17)
-62
-2.0pp
Tertiary education and independence (18 to 24)
-11
-0.5pp
Young workforce (25 to 34)
+51
+1.1pp
Parents and homebuilders (35 to 49)
-65
-2.4pp
Older workers and pre-retirees (50 to 59)
+56
+1.2pp
Empty nesters and retirees (60 to 69)
+20
+0.3pp
Seniors (70 to 84)
+97
+2.5pp
Elderly aged (85 and over)
-19
-0.6pp
Data table
Service age groups for Ceduna (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) | 233 | 6.6% | 4.9% | 248 | 7.3% | 5.5% | -15 | -0.7pp |
| Primary schoolers (5 to 11) | 343 | 9.8% | 8.1% | 321 | 9.4% | 8.6% | +22 | +0.4pp |
| Secondary schoolers (12 to 17) | 224 | 6.4% | 7.0% | 286 | 8.4% | 7.2% | -62 | -2.0pp |
| Tertiary education and independence (18 to 24) | 259 | 7.4% | 6.5% | 270 | 7.9% | 6.8% | -11 | -0.5pp |
| Young workforce (25 to 34) | 467 | 13.3% | 10.5% | 416 | 12.2% | 10.4% | +51 | +1.1pp |
| Parents and homebuilders (35 to 49) | 593 | 16.9% | 16.4% | 658 | 19.3% | 17.8% | -65 | -2.4pp |
| Older workers and pre-retirees (50 to 59) | 488 | 13.9% | 13.9% | 432 | 12.7% | 14.6% | +56 | +1.2pp |
| Empty nesters and retirees (60 to 69) | 454 | 13.0% | 15.1% | 434 | 12.7% | 14.4% | +20 | +0.3pp |
| Seniors (70 to 84) | 383 | 10.9% | 14.7% | 286 | 8.4% | 12.1% | +97 | +2.5pp |
| Elderly aged (85 and over) | 47 | 1.3% | 2.8% | 66 | 1.9% | 2.7% | -19 | -0.6pp |
| Total | 3,505 | 100.0% | 100.0% | 3,408 | 100.0% | 100.0% | +97 | 0.0pp |