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, Empty nesters and retirees (60 to 69) was the most common category among residents in Black Mountain (Qld), accounting for 19% (296 people). This share was higher than Noosa (S) (16.2%). Since 2016, the biggest change was in Empty nesters and retirees (60 to 69), which increased by 55 people and 2.3 percentage points.
Section overview
Age structure - Service age groups
Black Mountain (Qld) - Total persons (Usual residence)
This table summarises service age groups for Black Mountain (Qld) in 2021 for persons, with comparison against Noosa (S) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Black Mountain (Qld), with comparison markers for Noosa (S).
Babies and pre-schoolers (0 to 4)
2021 count
63
% of total
4.0%
Change from 2016
+0.5pp
63
4.0%
+0.5pp
Primary schoolers (5 to 11)
2021 count
106
% of total
6.8%
Change from 2016
-1.8pp
106
6.8%
-1.8pp
Secondary schoolers (12 to 17)
2021 count
118
% of total
7.6%
Change from 2016
-1.5pp
118
7.6%
-1.5pp
Tertiary education and independence (18 to 24)
2021 count
93
% of total
6.0%
Change from 2016
+0.7pp
93
6.0%
+0.7pp
Young workforce (25 to 34)
2021 count
108
% of total
6.9%
Change from 2016
+0.1pp
108
6.9%
+0.1pp
Parents and homebuilders (35 to 49)
2021 count
282
% of total
18.1%
Change from 2016
-3.4pp
282
18.1%
-3.4pp
Older workers and pre-retirees (50 to 59)
2021 count
277
% of total
17.8%
Change from 2016
-0.3pp
277
17.8%
-0.3pp
Empty nesters and retirees (60 to 69)
2021 count
296
% of total
19.0%
Change from 2016
+2.3pp
296
19.0%
+2.3pp
Seniors (70 to 84)
2021 count
210
% of total
13.5%
Change from 2016
+1.7pp
210
13.5%
+1.7pp
Elderly aged (85 and over)
2021 count
9
% of total
0.6%
Change from 2016
-0.2pp
9
0.6%
-0.2pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
+12
+0.5pp
Primary schoolers (5 to 11)
-18
-1.8pp
Secondary schoolers (12 to 17)
-13
-1.5pp
Tertiary education and independence (18 to 24)
+16
+0.7pp
Young workforce (25 to 34)
+10
+0.1pp
Parents and homebuilders (35 to 49)
-28
-3.4pp
Older workers and pre-retirees (50 to 59)
+16
-0.3pp
Empty nesters and retirees (60 to 69)
+55
+2.3pp
Seniors (70 to 84)
+40
+1.7pp
Elderly aged (85 and over)
-3
-0.2pp
Data table
Service age groups for Black Mountain (Qld). Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Noosa (S).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Noosa (S)% | Count | % | Noosa (S)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 63 | 4.0% | 3.6% | 51 | 3.5% | 4.2% | +12 | +0.5pp |
| Primary schoolers (5 to 11) | 106 | 6.8% | 7.4% | 124 | 8.6% | 8.2% | -18 | -1.8pp |
| Secondary schoolers (12 to 17) | 118 | 7.6% | 7.5% | 131 | 9.1% | 7.5% | -13 | -1.5pp |
| Tertiary education and independence (18 to 24) | 93 | 6.0% | 5.2% | 77 | 5.3% | 5.3% | +16 | +0.7pp |
| Young workforce (25 to 34) | 108 | 6.9% | 7.3% | 98 | 6.8% | 7.4% | +10 | +0.1pp |
| Parents and homebuilders (35 to 49) | 282 | 18.1% | 17.7% | 310 | 21.5% | 19.1% | -28 | -3.4pp |
| Older workers and pre-retirees (50 to 59) | 277 | 17.8% | 15.2% | 261 | 18.1% | 16.0% | +16 | -0.3pp |
| Empty nesters and retirees (60 to 69) | 296 | 19.0% | 16.2% | 241 | 16.7% | 16.4% | +55 | +2.3pp |
| Seniors (70 to 84) | 210 | 13.5% | 16.9% | 170 | 11.8% | 13.2% | +40 | +1.7pp |
| Elderly aged (85 and over) | 9 | 0.6% | 2.9% | 12 | 0.8% | 2.6% | -3 | -0.2pp |
| Total | 1,560 | 100.0% | 100.0% | 1,444 | 100.0% | 100.0% | +116 | 0.0pp |