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 Geilston Bay, accounting for 19.6% (677 people). This share was higher than Clarence (C) (18.8%). Since 2016, the biggest change was in Seniors (70 to 84), which increased by 118 people and 2.3 percentage points.
Section overview
Age structure - Service age groups
Geilston Bay - Total persons (Usual residence)
This table summarises service age groups for Geilston Bay in 2021 for persons, with comparison against Clarence (C) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Geilston Bay, with comparison markers for Clarence (C).
Babies and pre-schoolers (0 to 4)
2021 count
186
% of total
5.4%
Change from 2016
-0.6pp
186
5.4%
-0.6pp
Primary schoolers (5 to 11)
2021 count
265
% of total
7.7%
Change from 2016
0.0pp
265
7.7%
0.0pp
Secondary schoolers (12 to 17)
2021 count
202
% of total
5.8%
Change from 2016
-0.6pp
202
5.8%
-0.6pp
Tertiary education and independence (18 to 24)
2021 count
249
% of total
7.2%
Change from 2016
+0.9pp
249
7.2%
+0.9pp
Young workforce (25 to 34)
2021 count
444
% of total
12.8%
Change from 2016
+0.7pp
444
12.8%
+0.7pp
Parents and homebuilders (35 to 49)
2021 count
677
% of total
19.6%
Change from 2016
+0.4pp
677
19.6%
+0.4pp
Older workers and pre-retirees (50 to 59)
2021 count
401
% of total
11.6%
Change from 2016
-3.4pp
401
11.6%
-3.4pp
Empty nesters and retirees (60 to 69)
2021 count
455
% of total
13.1%
Change from 2016
+0.9pp
455
13.1%
+0.9pp
Seniors (70 to 84)
2021 count
491
% of total
14.2%
Change from 2016
+2.3pp
491
14.2%
+2.3pp
Elderly aged (85 and over)
2021 count
91
% of total
2.6%
Change from 2016
+0.5pp
91
2.6%
+0.5pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
-2
-0.6pp
Primary schoolers (5 to 11)
+23
0.0pp
Secondary schoolers (12 to 17)
+2
-0.6pp
Tertiary education and independence (18 to 24)
+50
+0.9pp
Young workforce (25 to 34)
+65
+0.7pp
Parents and homebuilders (35 to 49)
+74
+0.4pp
Older workers and pre-retirees (50 to 59)
-69
-3.4pp
Empty nesters and retirees (60 to 69)
+71
+0.9pp
Seniors (70 to 84)
+118
+2.3pp
Elderly aged (85 and over)
+26
+0.5pp
Data table
Service age groups for Geilston Bay. Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Clarence (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Clarence (C)% | Count | % | Clarence (C)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 186 | 5.4% | 5.4% | 188 | 6.0% | 5.8% | -2 | -0.6pp |
| Primary schoolers (5 to 11) | 265 | 7.7% | 8.1% | 242 | 7.7% | 8.8% | +23 | 0.0pp |
| Secondary schoolers (12 to 17) | 202 | 5.8% | 6.8% | 200 | 6.4% | 6.9% | +2 | -0.6pp |
| Tertiary education and independence (18 to 24) | 249 | 7.2% | 7.2% | 199 | 6.3% | 7.4% | +50 | +0.9pp |
| Young workforce (25 to 34) | 444 | 12.8% | 14.0% | 379 | 12.1% | 11.3% | +65 | +0.7pp |
| Parents and homebuilders (35 to 49) | 677 | 19.6% | 18.8% | 603 | 19.2% | 19.1% | +74 | +0.4pp |
| Older workers and pre-retirees (50 to 59) | 401 | 11.6% | 12.1% | 470 | 15.0% | 14.1% | -69 | -3.4pp |
| Empty nesters and retirees (60 to 69) | 455 | 13.1% | 12.5% | 384 | 12.2% | 12.9% | +71 | +0.9pp |
| Seniors (70 to 84) | 491 | 14.2% | 12.3% | 373 | 11.9% | 11.0% | +118 | +2.3pp |
| Elderly aged (85 and over) | 91 | 2.6% | 2.7% | 65 | 2.1% | 2.7% | +26 | +0.5pp |
| Total | 3,461 | 100.0% | 100.0% | 3,135 | 100.0% | 100.0% | +326 | 0.0pp |