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, Seniors (70 to 84) was the most common category among residents in Seaforth (Qld), accounting for 19.9% (159 people). This share was higher than Mackay (R) (8.6%). Since 2016, the biggest change was in Seniors (70 to 84), which increased by 41 people and 4.9 percentage points.
Section overview
Age structure - Service age groups
Seaforth (Qld) - Total persons (Usual residence)
This table summarises service age groups for Seaforth (Qld) in 2021 for persons, with comparison against Mackay (R) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Seaforth (Qld), with comparison markers for Mackay (R).
Babies and pre-schoolers (0 to 4)
2021 count
33
% of total
4.1%
Change from 2016
-1.0pp
33
4.1%
-1.0pp
Primary schoolers (5 to 11)
2021 count
42
% of total
5.3%
Change from 2016
-1.7pp
42
5.3%
-1.7pp
Secondary schoolers (12 to 17)
2021 count
47
% of total
5.9%
Change from 2016
+2.1pp
47
5.9%
+2.1pp
Tertiary education and independence (18 to 24)
2021 count
29
% of total
3.6%
Change from 2016
-1.2pp
29
3.6%
-1.2pp
Young workforce (25 to 34)
2021 count
39
% of total
4.9%
Change from 2016
-1.4pp
39
4.9%
-1.4pp
Parents and homebuilders (35 to 49)
2021 count
135
% of total
16.9%
Change from 2016
-1.2pp
135
16.9%
-1.2pp
Older workers and pre-retirees (50 to 59)
2021 count
130
% of total
16.3%
Change from 2016
-0.4pp
130
16.3%
-0.4pp
Empty nesters and retirees (60 to 69)
2021 count
142
% of total
17.8%
Change from 2016
+2.2pp
142
17.8%
+2.2pp
Seniors (70 to 84)
2021 count
159
% of total
19.9%
Change from 2016
+4.9pp
159
19.9%
+4.9pp
Elderly aged (85 and over)
2021 count
13
% of total
1.6%
Change from 2016
+0.5pp
13
1.6%
+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)
-7
-1.0pp
Primary schoolers (5 to 11)
-13
-1.7pp
Secondary schoolers (12 to 17)
+17
+2.1pp
Tertiary education and independence (18 to 24)
-9
-1.2pp
Young workforce (25 to 34)
-11
-1.4pp
Parents and homebuilders (35 to 49)
-8
-1.2pp
Older workers and pre-retirees (50 to 59)
-2
-0.4pp
Empty nesters and retirees (60 to 69)
+19
+2.2pp
Seniors (70 to 84)
+41
+4.9pp
Elderly aged (85 and over)
+4
+0.5pp
Data table
Service age groups for Seaforth (Qld). Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Mackay (R).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Mackay (R)% | Count | % | Mackay (R)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 33 | 4.1% | 6.2% | 40 | 5.1% | 6.7% | -7 | -1.0pp |
| Primary schoolers (5 to 11) | 42 | 5.3% | 9.6% | 55 | 7.0% | 9.9% | -13 | -1.7pp |
| Secondary schoolers (12 to 17) | 47 | 5.9% | 8.3% | 30 | 3.8% | 8.1% | +17 | +2.1pp |
| Tertiary education and independence (18 to 24) | 29 | 3.6% | 7.8% | 38 | 4.8% | 8.1% | -9 | -1.2pp |
| Young workforce (25 to 34) | 39 | 4.9% | 12.8% | 50 | 6.3% | 13.5% | -11 | -1.4pp |
| Parents and homebuilders (35 to 49) | 135 | 16.9% | 19.9% | 143 | 18.1% | 20.7% | -8 | -1.2pp |
| Older workers and pre-retirees (50 to 59) | 130 | 16.3% | 13.8% | 132 | 16.7% | 14.2% | -2 | -0.4pp |
| Empty nesters and retirees (60 to 69) | 142 | 17.8% | 11.4% | 123 | 15.6% | 10.1% | +19 | +2.2pp |
| Seniors (70 to 84) | 159 | 19.9% | 8.6% | 118 | 15.0% | 7.2% | +41 | +4.9pp |
| Elderly aged (85 and over) | 13 | 1.6% | 1.6% | 9 | 1.1% | 1.4% | +4 | +0.5pp |
| Total | 800 | 100.0% | 100.0% | 789 | 100.0% | 100.0% | +11 | 0.0pp |