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 Blakehurst, accounting for 17.9% (1,191 people). This share was lower than Georges River (A) (19.9%). Since 2016, the biggest change was in Parents and homebuilders (35 to 49), which increased by 1,169 people and 3.3 percentage points.
Section overview
Age structure - Service age groups
Blakehurst - Total persons (Usual residence)
This table summarises service age groups for Blakehurst in 2021 for persons, with comparison against Georges River (A) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Blakehurst, with comparison markers for Georges River (A).
Babies and pre-schoolers (0 to 4)
2021 count
280
% of total
4.2%
Change from 2016
+4.2pp
280
4.2%
+4.2pp
Primary schoolers (5 to 11)
2021 count
609
% of total
9.2%
Change from 2016
-3.4pp
609
9.2%
-3.4pp
Secondary schoolers (12 to 17)
2021 count
570
% of total
8.6%
Change from 2016
-2.7pp
570
8.6%
-2.7pp
Tertiary education and independence (18 to 24)
2021 count
634
% of total
9.5%
Change from 2016
+7.5pp
634
9.5%
+7.5pp
Young workforce (25 to 34)
2021 count
616
% of total
9.3%
Change from 2016
+2.7pp
616
9.3%
+2.7pp
Parents and homebuilders (35 to 49)
2021 count
1,191
% of total
17.9%
Change from 2016
+3.3pp
1,191
17.9%
+3.3pp
Older workers and pre-retirees (50 to 59)
2021 count
988
% of total
14.9%
Change from 2016
-4.3pp
988
14.9%
-4.3pp
Empty nesters and retirees (60 to 69)
2021 count
741
% of total
11.1%
Change from 2016
+2.5pp
741
11.1%
+2.5pp
Seniors (70 to 84)
2021 count
731
% of total
11.0%
Change from 2016
-4.9pp
731
11.0%
-4.9pp
Elderly aged (85 and over)
2021 count
282
% of total
4.2%
Change from 2016
+4.2pp
282
4.2%
+4.2pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
+280
+4.2pp
Primary schoolers (5 to 11)
+590
-3.4pp
Secondary schoolers (12 to 17)
+553
-2.7pp
Tertiary education and independence (18 to 24)
+631
+7.5pp
Young workforce (25 to 34)
+606
+2.7pp
Parents and homebuilders (35 to 49)
+1,169
+3.3pp
Older workers and pre-retirees (50 to 59)
+959
-4.3pp
Empty nesters and retirees (60 to 69)
+728
+2.5pp
Seniors (70 to 84)
+707
-4.9pp
Elderly aged (85 and over)
+282
+4.2pp
Data table
Service age groups for Blakehurst. Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Georges River (A).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Georges River (A)% | Count | % | Georges River (A)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 280 | 4.2% | 5.0% | 0 | 0.0% | 5.8% | +280 | +4.2pp |
| Primary schoolers (5 to 11) | 609 | 9.2% | 7.7% | 19 | 12.6% | 7.7% | +590 | -3.4pp |
| Secondary schoolers (12 to 17) | 570 | 8.6% | 6.3% | 17 | 11.3% | 6.6% | +553 | -2.7pp |
| Tertiary education and independence (18 to 24) | 634 | 9.5% | 9.8% | 3 | 2.0% | 10.2% | +631 | +7.5pp |
| Young workforce (25 to 34) | 616 | 9.3% | 15.5% | 10 | 6.6% | 16.6% | +606 | +2.7pp |
| Parents and homebuilders (35 to 49) | 1,191 | 17.9% | 19.9% | 22 | 14.6% | 19.6% | +1,169 | +3.3pp |
| Older workers and pre-retirees (50 to 59) | 988 | 14.9% | 12.6% | 29 | 19.2% | 12.8% | +959 | -4.3pp |
| Empty nesters and retirees (60 to 69) | 741 | 11.1% | 10.8% | 13 | 8.6% | 9.7% | +728 | +2.5pp |
| Seniors (70 to 84) | 731 | 11.0% | 9.6% | 24 | 15.9% | 8.3% | +707 | -4.9pp |
| Elderly aged (85 and over) | 282 | 4.2% | 2.8% | 0 | 0.0% | 2.6% | +282 | +4.2pp |
| Total | 6,652 | 100.0% | 100.0% | 151 | 100.0% | 100.0% | +6,501 | 0.0pp |