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 Seaford Meadows, accounting for 22.8% (1,165 people). This share was higher than Onkaparinga (C) (19.2%). Since 2016, the biggest change was in Young workforce (25 to 34), which increased by 479 people and 7.4 percentage points.
Section overview
Age structure - Service age groups
Seaford Meadows - Total persons (Usual residence)
This table summarises service age groups for Seaford Meadows in 2021 for persons, with comparison against Onkaparinga (C) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Seaford Meadows, with comparison markers for Onkaparinga (C).
Babies and pre-schoolers (0 to 4)
2021 count
449
% of total
8.8%
Change from 2016
+3.5pp
449
8.8%
+3.5pp
Primary schoolers (5 to 11)
2021 count
596
% of total
11.7%
Change from 2016
+4.5pp
596
11.7%
+4.5pp
Secondary schoolers (12 to 17)
2021 count
414
% of total
8.1%
Change from 2016
+2.5pp
414
8.1%
+2.5pp
Tertiary education and independence (18 to 24)
2021 count
433
% of total
8.5%
Change from 2016
+1.6pp
433
8.5%
+1.6pp
Young workforce (25 to 34)
2021 count
1,006
% of total
19.7%
Change from 2016
+7.4pp
1,006
19.7%
+7.4pp
Parents and homebuilders (35 to 49)
2021 count
1,165
% of total
22.8%
Change from 2016
+3.3pp
1,165
22.8%
+3.3pp
Older workers and pre-retirees (50 to 59)
2021 count
428
% of total
8.4%
Change from 2016
-4.8pp
428
8.4%
-4.8pp
Empty nesters and retirees (60 to 69)
2021 count
297
% of total
5.8%
Change from 2016
-8.8pp
297
5.8%
-8.8pp
Seniors (70 to 84)
2021 count
264
% of total
5.2%
Change from 2016
-6.4pp
264
5.2%
-6.4pp
Elderly aged (85 and over)
2021 count
30
% of total
0.6%
Change from 2016
-3.3pp
30
0.6%
-3.3pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
+221
+3.5pp
Primary schoolers (5 to 11)
+288
+4.5pp
Secondary schoolers (12 to 17)
+172
+2.5pp
Tertiary education and independence (18 to 24)
+138
+1.6pp
Young workforce (25 to 34)
+479
+7.4pp
Parents and homebuilders (35 to 49)
+326
+3.3pp
Older workers and pre-retirees (50 to 59)
-139
-4.8pp
Empty nesters and retirees (60 to 69)
-331
-8.8pp
Seniors (70 to 84)
-235
-6.4pp
Elderly aged (85 and over)
-138
-3.3pp
Data table
Service age groups for Seaford Meadows. Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Onkaparinga (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Onkaparinga (C)% | Count | % | Onkaparinga (C)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 449 | 8.8% | 5.4% | 228 | 5.3% | 6.2% | +221 | +3.5pp |
| Primary schoolers (5 to 11) | 596 | 11.7% | 8.6% | 308 | 7.2% | 8.9% | +288 | +4.5pp |
| Secondary schoolers (12 to 17) | 414 | 8.1% | 7.3% | 242 | 5.6% | 7.5% | +172 | +2.5pp |
| Tertiary education and independence (18 to 24) | 433 | 8.5% | 7.9% | 295 | 6.9% | 8.4% | +138 | +1.6pp |
| Young workforce (25 to 34) | 1,006 | 19.7% | 12.2% | 527 | 12.3% | 12.4% | +479 | +7.4pp |
| Parents and homebuilders (35 to 49) | 1,165 | 22.8% | 19.2% | 839 | 19.5% | 19.7% | +326 | +3.3pp |
| Older workers and pre-retirees (50 to 59) | 428 | 8.4% | 13.1% | 567 | 13.2% | 13.3% | -139 | -4.8pp |
| Empty nesters and retirees (60 to 69) | 297 | 5.8% | 12.3% | 628 | 14.6% | 12.4% | -331 | -8.8pp |
| Seniors (70 to 84) | 264 | 5.2% | 11.8% | 499 | 11.6% | 9.1% | -235 | -6.4pp |
| Elderly aged (85 and over) | 30 | 0.6% | 2.2% | 168 | 3.9% | 2.1% | -138 | -3.3pp |
| Total | 5,102 | 100.0% | 100.0% | 4,298 | 100.0% | 100.0% | +804 | 0.0pp |