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 Trinity Beach, accounting for 20.5% (1,354 people). This share was lower than Cairns (R) (20.9%). Since 2016, the biggest change was in Seniors (70 to 84), which increased by 243 people and 2.5 percentage points.
Section overview
Age structure - Service age groups
Trinity Beach - Total persons (Usual residence)
This table summarises service age groups for Trinity Beach in 2021 for persons, with comparison against Cairns (R) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Trinity Beach, with comparison markers for Cairns (R).
Babies and pre-schoolers (0 to 4)
2021 count
323
% of total
4.9%
Change from 2016
-0.9pp
323
4.9%
-0.9pp
Primary schoolers (5 to 11)
2021 count
609
% of total
9.2%
Change from 2016
-0.5pp
609
9.2%
-0.5pp
Secondary schoolers (12 to 17)
2021 count
495
% of total
7.5%
Change from 2016
0.0pp
495
7.5%
0.0pp
Tertiary education and independence (18 to 24)
2021 count
411
% of total
6.2%
Change from 2016
-0.1pp
411
6.2%
-0.1pp
Young workforce (25 to 34)
2021 count
811
% of total
12.3%
Change from 2016
-0.3pp
811
12.3%
-0.3pp
Parents and homebuilders (35 to 49)
2021 count
1,354
% of total
20.5%
Change from 2016
-2.9pp
1,354
20.5%
-2.9pp
Older workers and pre-retirees (50 to 59)
2021 count
1,025
% of total
15.5%
Change from 2016
+0.3pp
1,025
15.5%
+0.3pp
Empty nesters and retirees (60 to 69)
2021 count
894
% of total
13.6%
Change from 2016
+1.7pp
894
13.6%
+1.7pp
Seniors (70 to 84)
2021 count
623
% of total
9.4%
Change from 2016
+2.5pp
623
9.4%
+2.5pp
Elderly aged (85 and over)
2021 count
74
% of total
1.1%
Change from 2016
+0.4pp
74
1.1%
+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)
+4
-0.9pp
Primary schoolers (5 to 11)
+76
-0.5pp
Secondary schoolers (12 to 17)
+85
0.0pp
Tertiary education and independence (18 to 24)
+63
-0.1pp
Young workforce (25 to 34)
+119
-0.3pp
Parents and homebuilders (35 to 49)
+69
-2.9pp
Older workers and pre-retirees (50 to 59)
+189
+0.3pp
Empty nesters and retirees (60 to 69)
+242
+1.7pp
Seniors (70 to 84)
+243
+2.5pp
Elderly aged (85 and over)
+33
+0.4pp
Data table
Service age groups for Trinity Beach. Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Cairns (R).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Cairns (R)% | Count | % | Cairns (R)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 323 | 4.9% | 5.5% | 319 | 5.8% | 6.5% | +4 | -0.9pp |
| Primary schoolers (5 to 11) | 609 | 9.2% | 9.2% | 533 | 9.7% | 9.9% | +76 | -0.5pp |
| Secondary schoolers (12 to 17) | 495 | 7.5% | 8.3% | 410 | 7.5% | 8.1% | +85 | 0.0pp |
| Tertiary education and independence (18 to 24) | 411 | 6.2% | 7.7% | 348 | 6.3% | 8.0% | +63 | -0.1pp |
| Young workforce (25 to 34) | 811 | 12.3% | 13.2% | 692 | 12.6% | 13.6% | +119 | -0.3pp |
| Parents and homebuilders (35 to 49) | 1,354 | 20.5% | 20.9% | 1,285 | 23.4% | 21.9% | +69 | -2.9pp |
| Older workers and pre-retirees (50 to 59) | 1,025 | 15.5% | 13.6% | 836 | 15.2% | 13.6% | +189 | +0.3pp |
| Empty nesters and retirees (60 to 69) | 894 | 13.6% | 11.2% | 652 | 11.9% | 10.4% | +242 | +1.7pp |
| Seniors (70 to 84) | 623 | 9.4% | 8.8% | 380 | 6.9% | 6.6% | +243 | +2.5pp |
| Elderly aged (85 and over) | 74 | 1.1% | 1.5% | 41 | 0.7% | 1.3% | +33 | +0.4pp |
| Total | 6,594 | 100.0% | 100.0% | 5,488 | 100.0% | 100.0% | +1,106 | 0.0pp |