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 Billinudgel, accounting for 21.1% (55 people). This share was lower than Byron (A) (21.7%). Since 2016, the biggest change was in Older workers and pre-retirees (50 to 59), which increased by 30 people and 6 percentage points.
Section overview
Age structure - Service age groups
Billinudgel - Total persons (Usual residence)
This table summarises service age groups for Billinudgel in 2021 for persons, with comparison against Byron (A) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Billinudgel, with comparison markers for Byron (A).
Babies and pre-schoolers (0 to 4)
2021 count
19
% of total
7.3%
Change from 2016
+7.3pp
19
7.3%
+7.3pp
Primary schoolers (5 to 11)
2021 count
27
% of total
10.3%
Change from 2016
+1.1pp
27
10.3%
+1.1pp
Secondary schoolers (12 to 17)
2021 count
12
% of total
4.6%
Change from 2016
-2.6pp
12
4.6%
-2.6pp
Tertiary education and independence (18 to 24)
2021 count
4
% of total
1.5%
Change from 2016
-2.4pp
4
1.5%
-2.4pp
Young workforce (25 to 34)
2021 count
28
% of total
10.7%
Change from 2016
+2.1pp
28
10.7%
+2.1pp
Parents and homebuilders (35 to 49)
2021 count
55
% of total
21.1%
Change from 2016
+2.7pp
55
21.1%
+2.7pp
Older workers and pre-retirees (50 to 59)
2021 count
50
% of total
19.2%
Change from 2016
+6.0pp
50
19.2%
+6.0pp
Empty nesters and retirees (60 to 69)
2021 count
41
% of total
15.7%
Change from 2016
+4.5pp
41
15.7%
+4.5pp
Seniors (70 to 84)
2021 count
23
% of total
8.8%
Change from 2016
+2.9pp
23
8.8%
+2.9pp
Elderly aged (85 and over)
2021 count
6
% of total
2.3%
Change from 2016
+2.3pp
6
2.3%
+2.3pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
+19
+7.3pp
Primary schoolers (5 to 11)
+13
+1.1pp
Secondary schoolers (12 to 17)
+1
-2.6pp
Tertiary education and independence (18 to 24)
-2
-2.4pp
Young workforce (25 to 34)
+15
+2.1pp
Parents and homebuilders (35 to 49)
+27
+2.7pp
Older workers and pre-retirees (50 to 59)
+30
+6.0pp
Empty nesters and retirees (60 to 69)
+24
+4.5pp
Seniors (70 to 84)
+14
+2.9pp
Elderly aged (85 and over)
+6
+2.3pp
Data table
Service age groups for Billinudgel. Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Byron (A).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Byron (A)% | Count | % | Byron (A)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 19 | 7.3% | 4.8% | 0 | 0.0% | 4.9% | +19 | +7.3pp |
| Primary schoolers (5 to 11) | 27 | 10.3% | 7.7% | 14 | 9.2% | 8.4% | +13 | +1.1pp |
| Secondary schoolers (12 to 17) | 12 | 4.6% | 6.7% | 11 | 7.2% | 6.8% | +1 | -2.6pp |
| Tertiary education and independence (18 to 24) | 4 | 1.5% | 5.7% | 6 | 3.9% | 5.5% | -2 | -2.4pp |
| Young workforce (25 to 34) | 28 | 10.7% | 13.5% | 13 | 8.6% | 10.8% | +15 | +2.1pp |
| Parents and homebuilders (35 to 49) | 55 | 21.1% | 21.7% | 28 | 18.4% | 21.4% | +27 | +2.7pp |
| Older workers and pre-retirees (50 to 59) | 50 | 19.2% | 13.9% | 20 | 13.2% | 16.6% | +30 | +6.0pp |
| Empty nesters and retirees (60 to 69) | 41 | 15.7% | 14.6% | 17 | 11.2% | 15.3% | +24 | +4.5pp |
| Seniors (70 to 84) | 23 | 8.8% | 9.9% | 9 | 5.9% | 8.0% | +14 | +2.9pp |
| Elderly aged (85 and over) | 6 | 2.3% | 1.6% | 0 | 0.0% | 2.2% | +6 | +2.3pp |
| Total | 261 | 100.0% | 100.0% | 152 | 100.0% | 100.0% | +109 | 0.0pp |