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 Streaky Bay (DC), accounting for 18.2% (395 people). This share was higher than Regional SA (15.1%). Since 2016, the biggest change was in Seniors (70 to 84), which increased by 89 people and 3.7 percentage points.
Section overview
Age structure - Service age groups
Streaky Bay (DC) - Total persons (Usual residence)
This table summarises service age groups for Streaky Bay (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 Streaky Bay (DC), with comparison markers for Regional SA.
Babies and pre-schoolers (0 to 4)
2021 count
118
% of total
5.5%
Change from 2016
-0.7pp
118
5.5%
-0.7pp
Primary schoolers (5 to 11)
2021 count
204
% of total
9.4%
Change from 2016
-0.8pp
204
9.4%
-0.8pp
Secondary schoolers (12 to 17)
2021 count
135
% of total
6.2%
Change from 2016
+0.1pp
135
6.2%
+0.1pp
Tertiary education and independence (18 to 24)
2021 count
95
% of total
4.4%
Change from 2016
-0.7pp
95
4.4%
-0.7pp
Young workforce (25 to 34)
2021 count
220
% of total
10.2%
Change from 2016
+0.8pp
220
10.2%
+0.8pp
Parents and homebuilders (35 to 49)
2021 count
371
% of total
17.1%
Change from 2016
-1.3pp
371
17.1%
-1.3pp
Older workers and pre-retirees (50 to 59)
2021 count
280
% of total
12.9%
Change from 2016
-2.9pp
280
12.9%
-2.9pp
Empty nesters and retirees (60 to 69)
2021 count
395
% of total
18.2%
Change from 2016
+1.8pp
395
18.2%
+1.8pp
Seniors (70 to 84)
2021 count
278
% of total
12.8%
Change from 2016
+3.7pp
278
12.8%
+3.7pp
Elderly aged (85 and over)
2021 count
52
% of total
2.4%
Change from 2016
-0.1pp
52
2.4%
-0.1pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
-11
-0.7pp
Primary schoolers (5 to 11)
-7
-0.8pp
Secondary schoolers (12 to 17)
+8
+0.1pp
Tertiary education and independence (18 to 24)
-10
-0.7pp
Young workforce (25 to 34)
+25
+0.8pp
Parents and homebuilders (35 to 49)
-11
-1.3pp
Older workers and pre-retirees (50 to 59)
-48
-2.9pp
Empty nesters and retirees (60 to 69)
+54
+1.8pp
Seniors (70 to 84)
+89
+3.7pp
Elderly aged (85 and over)
0
-0.1pp
Data table
Service age groups for Streaky Bay (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) | 118 | 5.5% | 4.9% | 129 | 6.2% | 5.5% | -11 | -0.7pp |
| Primary schoolers (5 to 11) | 204 | 9.4% | 8.1% | 211 | 10.2% | 8.6% | -7 | -0.8pp |
| Secondary schoolers (12 to 17) | 135 | 6.2% | 7.0% | 127 | 6.1% | 7.2% | +8 | +0.1pp |
| Tertiary education and independence (18 to 24) | 95 | 4.4% | 6.5% | 105 | 5.1% | 6.8% | -10 | -0.7pp |
| Young workforce (25 to 34) | 220 | 10.2% | 10.5% | 195 | 9.4% | 10.4% | +25 | +0.8pp |
| Parents and homebuilders (35 to 49) | 371 | 17.1% | 16.4% | 382 | 18.4% | 17.8% | -11 | -1.3pp |
| Older workers and pre-retirees (50 to 59) | 280 | 12.9% | 13.9% | 328 | 15.8% | 14.6% | -48 | -2.9pp |
| Empty nesters and retirees (60 to 69) | 395 | 18.2% | 15.1% | 341 | 16.4% | 14.4% | +54 | +1.8pp |
| Seniors (70 to 84) | 278 | 12.8% | 14.7% | 189 | 9.1% | 12.1% | +89 | +3.7pp |
| Elderly aged (85 and over) | 52 | 2.4% | 2.8% | 52 | 2.5% | 2.7% | 0 | -0.1pp |
| Total | 2,165 | 100.0% | 100.0% | 2,074 | 100.0% | 100.0% | +91 | 0.0pp |