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 Marayong, accounting for 19.7% (1,541 people). This share was lower than Blacktown (C) (23.4%). Since 2016, the biggest change was in Seniors (70 to 84), which increased by 140 people and 1.7 percentage points.
Section overview
Age structure - Service age groups
Marayong - Total persons (Usual residence)
This table summarises service age groups for Marayong in 2021 for persons, with comparison against Blacktown (C) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Marayong, with comparison markers for Blacktown (C).
Babies and pre-schoolers (0 to 4)
2021 count
525
% of total
6.7%
Change from 2016
-0.3pp
525
6.7%
-0.3pp
Primary schoolers (5 to 11)
2021 count
707
% of total
9.0%
Change from 2016
-0.2pp
707
9.0%
-0.2pp
Secondary schoolers (12 to 17)
2021 count
566
% of total
7.2%
Change from 2016
+0.5pp
566
7.2%
+0.5pp
Tertiary education and independence (18 to 24)
2021 count
700
% of total
8.9%
Change from 2016
-0.7pp
700
8.9%
-0.7pp
Young workforce (25 to 34)
2021 count
1,256
% of total
16.0%
Change from 2016
+0.5pp
1,256
16.0%
+0.5pp
Parents and homebuilders (35 to 49)
2021 count
1,541
% of total
19.7%
Change from 2016
+0.2pp
1,541
19.7%
+0.2pp
Older workers and pre-retirees (50 to 59)
2021 count
813
% of total
10.4%
Change from 2016
-0.6pp
813
10.4%
-0.6pp
Empty nesters and retirees (60 to 69)
2021 count
797
% of total
10.2%
Change from 2016
-0.4pp
797
10.2%
-0.4pp
Seniors (70 to 84)
2021 count
743
% of total
9.5%
Change from 2016
+1.7pp
743
9.5%
+1.7pp
Elderly aged (85 and over)
2021 count
200
% of total
2.6%
Change from 2016
-0.4pp
200
2.6%
-0.4pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
-14
-0.3pp
Primary schoolers (5 to 11)
-2
-0.2pp
Secondary schoolers (12 to 17)
+50
+0.5pp
Tertiary education and independence (18 to 24)
-39
-0.7pp
Young workforce (25 to 34)
+63
+0.5pp
Parents and homebuilders (35 to 49)
+41
+0.2pp
Older workers and pre-retirees (50 to 59)
-34
-0.6pp
Empty nesters and retirees (60 to 69)
-16
-0.4pp
Seniors (70 to 84)
+140
+1.7pp
Elderly aged (85 and over)
-30
-0.4pp
Data table
Service age groups for Marayong. 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) | 525 | 6.7% | 7.5% | 539 | 7.0% | 8.0% | -14 | -0.3pp |
| Primary schoolers (5 to 11) | 707 | 9.0% | 10.9% | 709 | 9.2% | 10.8% | -2 | -0.2pp |
| Secondary schoolers (12 to 17) | 566 | 7.2% | 8.0% | 516 | 6.7% | 8.2% | +50 | +0.5pp |
| Tertiary education and independence (18 to 24) | 700 | 8.9% | 9.1% | 739 | 9.6% | 9.5% | -39 | -0.7pp |
| Young workforce (25 to 34) | 1,256 | 16.0% | 14.9% | 1,193 | 15.5% | 15.5% | +63 | +0.5pp |
| Parents and homebuilders (35 to 49) | 1,541 | 19.7% | 23.4% | 1,500 | 19.5% | 21.7% | +41 | +0.2pp |
| Older workers and pre-retirees (50 to 59) | 813 | 10.4% | 10.7% | 847 | 11.0% | 11.4% | -34 | -0.6pp |
| Empty nesters and retirees (60 to 69) | 797 | 10.2% | 8.2% | 813 | 10.6% | 8.4% | -16 | -0.4pp |
| Seniors (70 to 84) | 743 | 9.5% | 6.2% | 603 | 7.8% | 5.4% | +140 | +1.7pp |
| Elderly aged (85 and over) | 200 | 2.6% | 1.1% | 230 | 3.0% | 1.1% | -30 | -0.4pp |
| Total | 7,834 | 100.0% | 100.0% | 7,706 | 100.0% | 100.0% | +128 | 0.0pp |