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 Nirimba Fields, accounting for 28.9% (472 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 405 people and 5.8 percentage points.
Section overview
Age structure - Service age groups
Nirimba Fields - Total persons (Usual residence)
This table summarises service age groups for Nirimba Fields in 2021 for persons, with comparison against Blacktown (C) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Nirimba Fields, with comparison markers for Blacktown (C).
Babies and pre-schoolers (0 to 4)
2021 count
165
% of total
10.1%
Change from 2016
+1.8pp
165
10.1%
+1.8pp
Primary schoolers (5 to 11)
2021 count
194
% of total
11.9%
Change from 2016
+0.9pp
194
11.9%
+0.9pp
Secondary schoolers (12 to 17)
2021 count
103
% of total
6.3%
Change from 2016
-1.8pp
103
6.3%
-1.8pp
Tertiary education and independence (18 to 24)
2021 count
127
% of total
7.8%
Change from 2016
-1.5pp
127
7.8%
-1.5pp
Young workforce (25 to 34)
2021 count
437
% of total
26.8%
Change from 2016
+11.1pp
437
26.8%
+11.1pp
Parents and homebuilders (35 to 49)
2021 count
472
% of total
28.9%
Change from 2016
+5.8pp
472
28.9%
+5.8pp
Older workers and pre-retirees (50 to 59)
2021 count
69
% of total
4.2%
Change from 2016
-7.3pp
69
4.2%
-7.3pp
Empty nesters and retirees (60 to 69)
2021 count
62
% of total
3.8%
Change from 2016
-4.8pp
62
3.8%
-4.8pp
Seniors (70 to 84)
2021 count
28
% of total
1.7%
Change from 2016
-2.2pp
28
1.7%
-2.2pp
Elderly aged (85 and over)
2021 count
6
% of total
0.4%
Change from 2016
-0.3pp
6
0.4%
-0.3pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
+141
+1.8pp
Primary schoolers (5 to 11)
+162
+0.9pp
Secondary schoolers (12 to 17)
+79
-1.8pp
Tertiary education and independence (18 to 24)
+100
-1.5pp
Young workforce (25 to 34)
+391
+11.1pp
Parents and homebuilders (35 to 49)
+405
+5.8pp
Older workers and pre-retirees (50 to 59)
+36
-7.3pp
Empty nesters and retirees (60 to 69)
+37
-4.8pp
Seniors (70 to 84)
+17
-2.2pp
Elderly aged (85 and over)
+4
-0.3pp
Data table
Service age groups for Nirimba Fields. 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) | 165 | 10.1% | 7.5% | 24 | 8.3% | 8.0% | +141 | +1.8pp |
| Primary schoolers (5 to 11) | 194 | 11.9% | 10.9% | 32 | 11.0% | 10.8% | +162 | +0.9pp |
| Secondary schoolers (12 to 17) | 103 | 6.3% | 8.0% | 24 | 8.1% | 8.2% | +79 | -1.8pp |
| Tertiary education and independence (18 to 24) | 127 | 7.8% | 9.1% | 27 | 9.3% | 9.5% | +100 | -1.5pp |
| Young workforce (25 to 34) | 437 | 26.8% | 14.9% | 46 | 15.7% | 15.5% | +391 | +11.1pp |
| Parents and homebuilders (35 to 49) | 472 | 28.9% | 23.4% | 67 | 23.1% | 21.7% | +405 | +5.8pp |
| Older workers and pre-retirees (50 to 59) | 69 | 4.2% | 10.7% | 33 | 11.5% | 11.4% | +36 | -7.3pp |
| Empty nesters and retirees (60 to 69) | 62 | 3.8% | 8.2% | 25 | 8.6% | 8.4% | +37 | -4.8pp |
| Seniors (70 to 84) | 28 | 1.7% | 6.2% | 11 | 3.9% | 5.4% | +17 | -2.2pp |
| Elderly aged (85 and over) | 6 | 0.4% | 1.1% | 2 | 0.7% | 1.1% | +4 | -0.3pp |
| Total | 1,632 | 100.0% | 100.0% | 292 | 100.0% | 100.0% | +1,340 | 0.0pp |