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 Parklea, accounting for 29.9% (1,102 people). This share was higher than Blacktown (C) (23.4%). Since 2016, the biggest change was in Parents and homebuilders (35 to 49), which increased by 69 people and 0.1 percentage points.
Section overview
Age structure - Service age groups
Parklea - Total persons (Usual residence)
This table summarises service age groups for Parklea in 2021 for persons, with comparison against Blacktown (C) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Parklea, with comparison markers for Blacktown (C).
Babies and pre-schoolers (0 to 4)
2021 count
154
% of total
4.2%
Change from 2016
-1.3pp
154
4.2%
-1.3pp
Primary schoolers (5 to 11)
2021 count
265
% of total
7.2%
Change from 2016
-1.0pp
265
7.2%
-1.0pp
Secondary schoolers (12 to 17)
2021 count
208
% of total
5.6%
Change from 2016
-1.0pp
208
5.6%
-1.0pp
Tertiary education and independence (18 to 24)
2021 count
408
% of total
11.1%
Change from 2016
-0.2pp
408
11.1%
-0.2pp
Young workforce (25 to 34)
2021 count
765
% of total
20.8%
Change from 2016
-0.5pp
765
20.8%
-0.5pp
Parents and homebuilders (35 to 49)
2021 count
1,102
% of total
29.9%
Change from 2016
+0.1pp
1,102
29.9%
+0.1pp
Older workers and pre-retirees (50 to 59)
2021 count
410
% of total
11.1%
Change from 2016
+0.2pp
410
11.1%
+0.2pp
Empty nesters and retirees (60 to 69)
2021 count
231
% of total
6.3%
Change from 2016
+1.3pp
231
6.3%
+1.3pp
Seniors (70 to 84)
2021 count
115
% of total
3.1%
Change from 2016
+1.3pp
115
3.1%
+1.3pp
Elderly aged (85 and over)
2021 count
4
% of total
0.1%
Change from 2016
0.0pp
4
0.1%
0.0pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
-35
-1.3pp
Primary schoolers (5 to 11)
-20
-1.0pp
Secondary schoolers (12 to 17)
-21
-1.0pp
Tertiary education and independence (18 to 24)
+16
-0.2pp
Young workforce (25 to 34)
+27
-0.5pp
Parents and homebuilders (35 to 49)
+69
+0.1pp
Older workers and pre-retirees (50 to 59)
+33
+0.2pp
Empty nesters and retirees (60 to 69)
+58
+1.3pp
Seniors (70 to 84)
+52
+1.3pp
Elderly aged (85 and over)
+1
0.0pp
Data table
Service age groups for Parklea. Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Blacktown (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Blacktown (C)% | Count | % | Blacktown (C)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 154 | 4.2% | 7.5% | 189 | 5.5% | 8.0% | -35 | -1.3pp |
| Primary schoolers (5 to 11) | 265 | 7.2% | 10.9% | 285 | 8.2% | 10.8% | -20 | -1.0pp |
| Secondary schoolers (12 to 17) | 208 | 5.6% | 8.0% | 229 | 6.6% | 8.2% | -21 | -1.0pp |
| Tertiary education and independence (18 to 24) | 408 | 11.1% | 9.1% | 392 | 11.3% | 9.5% | +16 | -0.2pp |
| Young workforce (25 to 34) | 765 | 20.8% | 14.9% | 738 | 21.3% | 15.5% | +27 | -0.5pp |
| Parents and homebuilders (35 to 49) | 1,102 | 29.9% | 23.4% | 1,033 | 29.8% | 21.7% | +69 | +0.1pp |
| Older workers and pre-retirees (50 to 59) | 410 | 11.1% | 10.7% | 377 | 10.9% | 11.4% | +33 | +0.2pp |
| Empty nesters and retirees (60 to 69) | 231 | 6.3% | 8.2% | 173 | 5.0% | 8.4% | +58 | +1.3pp |
| Seniors (70 to 84) | 115 | 3.1% | 6.2% | 63 | 1.8% | 5.4% | +52 | +1.3pp |
| Elderly aged (85 and over) | 4 | 0.1% | 1.1% | 3 | 0.1% | 1.1% | +1 | 0.0pp |
| Total | 3,684 | 100.0% | 100.0% | 3,465 | 100.0% | 100.0% | +219 | 0.0pp |