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 Brookfield (NSW), accounting for 18.3% (41 people). This share was higher than Dungog (A) (17.8%). Since 2016, the biggest change was in Babies and pre-schoolers (0 to 4), which increased by 15 people and 6.5 percentage points.
Section overview
Age structure - Service age groups
Brookfield (NSW) - Total persons (Usual residence)
This table summarises service age groups for Brookfield (NSW) in 2021 for persons, with comparison against Dungog (A) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Brookfield (NSW), with comparison markers for Dungog (A).
Babies and pre-schoolers (0 to 4)
2021 count
20
% of total
8.9%
Change from 2016
+6.5pp
20
8.9%
+6.5pp
Primary schoolers (5 to 11)
2021 count
7
% of total
3.1%
Change from 2016
-4.7pp
7
3.1%
-4.7pp
Secondary schoolers (12 to 17)
2021 count
15
% of total
6.7%
Change from 2016
-6.0pp
15
6.7%
-6.0pp
Tertiary education and independence (18 to 24)
2021 count
14
% of total
6.3%
Change from 2016
+1.4pp
14
6.3%
+1.4pp
Young workforce (25 to 34)
2021 count
17
% of total
7.6%
Change from 2016
+3.2pp
17
7.6%
+3.2pp
Parents and homebuilders (35 to 49)
2021 count
41
% of total
18.3%
Change from 2016
+0.7pp
41
18.3%
+0.7pp
Older workers and pre-retirees (50 to 59)
2021 count
41
% of total
18.3%
Change from 2016
-0.7pp
41
18.3%
-0.7pp
Empty nesters and retirees (60 to 69)
2021 count
31
% of total
13.8%
Change from 2016
-3.3pp
31
13.8%
-3.3pp
Seniors (70 to 84)
2021 count
32
% of total
14.3%
Change from 2016
+5.5pp
32
14.3%
+5.5pp
Elderly aged (85 and over)
2021 count
4
% of total
1.8%
Change from 2016
+1.8pp
4
1.8%
+1.8pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
+15
+6.5pp
Primary schoolers (5 to 11)
-9
-4.7pp
Secondary schoolers (12 to 17)
-11
-6.0pp
Tertiary education and independence (18 to 24)
+4
+1.4pp
Young workforce (25 to 34)
+8
+3.2pp
Parents and homebuilders (35 to 49)
+5
+0.7pp
Older workers and pre-retirees (50 to 59)
+2
-0.7pp
Empty nesters and retirees (60 to 69)
-4
-3.3pp
Seniors (70 to 84)
+14
+5.5pp
Elderly aged (85 and over)
+4
+1.8pp
Data table
Service age groups for Brookfield (NSW). Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Dungog (A).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Dungog (A)% | Count | % | Dungog (A)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 20 | 8.9% | 5.3% | 5 | 2.4% | 5.3% | +15 | +6.5pp |
| Primary schoolers (5 to 11) | 7 | 3.1% | 9.0% | 16 | 7.8% | 9.1% | -9 | -4.7pp |
| Secondary schoolers (12 to 17) | 15 | 6.7% | 7.6% | 26 | 12.7% | 7.9% | -11 | -6.0pp |
| Tertiary education and independence (18 to 24) | 14 | 6.3% | 6.3% | 10 | 4.9% | 6.5% | +4 | +1.4pp |
| Young workforce (25 to 34) | 17 | 7.6% | 9.1% | 9 | 4.4% | 9.1% | +8 | +3.2pp |
| Parents and homebuilders (35 to 49) | 41 | 18.3% | 17.8% | 36 | 17.6% | 18.2% | +5 | +0.7pp |
| Older workers and pre-retirees (50 to 59) | 41 | 18.3% | 14.9% | 39 | 19.0% | 16.2% | +2 | -0.7pp |
| Empty nesters and retirees (60 to 69) | 31 | 13.8% | 15.3% | 35 | 17.1% | 14.8% | -4 | -3.3pp |
| Seniors (70 to 84) | 32 | 14.3% | 12.8% | 18 | 8.8% | 11.0% | +14 | +5.5pp |
| Elderly aged (85 and over) | 4 | 1.8% | 2.0% | 0 | 0.0% | 2.0% | +4 | +1.8pp |
| Total | 224 | 100.0% | 100.0% | 205 | 100.0% | 100.0% | +19 | 0.0pp |