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 Mullumbimby, accounting for 20.1% (839 people). This share was lower than Byron (A) (21.7%). Since 2016, the biggest change was in Young workforce (25 to 34), which increased by 166 people and 3 percentage points.
Section overview
Age structure - Service age groups
Mullumbimby - Total persons (Usual residence)
This table summarises service age groups for Mullumbimby in 2021 for persons, with comparison against Byron (A) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Mullumbimby, with comparison markers for Byron (A).
Babies and pre-schoolers (0 to 4)
2021 count
189
% of total
4.5%
Change from 2016
0.0pp
189
4.5%
0.0pp
Primary schoolers (5 to 11)
2021 count
367
% of total
8.8%
Change from 2016
-0.4pp
367
8.8%
-0.4pp
Secondary schoolers (12 to 17)
2021 count
352
% of total
8.4%
Change from 2016
-0.4pp
352
8.4%
-0.4pp
Tertiary education and independence (18 to 24)
2021 count
233
% of total
5.6%
Change from 2016
+0.5pp
233
5.6%
+0.5pp
Young workforce (25 to 34)
2021 count
409
% of total
9.8%
Change from 2016
+3.0pp
409
9.8%
+3.0pp
Parents and homebuilders (35 to 49)
2021 count
839
% of total
20.1%
Change from 2016
-1.4pp
839
20.1%
-1.4pp
Older workers and pre-retirees (50 to 59)
2021 count
619
% of total
14.8%
Change from 2016
-1.4pp
619
14.8%
-1.4pp
Empty nesters and retirees (60 to 69)
2021 count
560
% of total
13.4%
Change from 2016
-0.2pp
560
13.4%
-0.2pp
Seniors (70 to 84)
2021 count
470
% of total
11.2%
Change from 2016
+1.2pp
470
11.2%
+1.2pp
Elderly aged (85 and over)
2021 count
110
% of total
2.6%
Change from 2016
-0.9pp
110
2.6%
-0.9pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
+26
0.0pp
Primary schoolers (5 to 11)
+36
-0.4pp
Secondary schoolers (12 to 17)
+34
-0.4pp
Tertiary education and independence (18 to 24)
+49
+0.5pp
Young workforce (25 to 34)
+166
+3.0pp
Parents and homebuilders (35 to 49)
+66
-1.4pp
Older workers and pre-retirees (50 to 59)
+37
-1.4pp
Empty nesters and retirees (60 to 69)
+70
-0.2pp
Seniors (70 to 84)
+109
+1.2pp
Elderly aged (85 and over)
-16
-0.9pp
Data table
Service age groups for Mullumbimby. 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) | 189 | 4.5% | 4.8% | 163 | 4.5% | 4.9% | +26 | 0.0pp |
| Primary schoolers (5 to 11) | 367 | 8.8% | 7.7% | 331 | 9.2% | 8.4% | +36 | -0.4pp |
| Secondary schoolers (12 to 17) | 352 | 8.4% | 6.7% | 318 | 8.8% | 6.8% | +34 | -0.4pp |
| Tertiary education and independence (18 to 24) | 233 | 5.6% | 5.7% | 184 | 5.1% | 5.5% | +49 | +0.5pp |
| Young workforce (25 to 34) | 409 | 9.8% | 13.5% | 243 | 6.8% | 10.8% | +166 | +3.0pp |
| Parents and homebuilders (35 to 49) | 839 | 20.1% | 21.7% | 773 | 21.5% | 21.4% | +66 | -1.4pp |
| Older workers and pre-retirees (50 to 59) | 619 | 14.8% | 13.9% | 582 | 16.2% | 16.6% | +37 | -1.4pp |
| Empty nesters and retirees (60 to 69) | 560 | 13.4% | 14.6% | 490 | 13.6% | 15.3% | +70 | -0.2pp |
| Seniors (70 to 84) | 470 | 11.2% | 9.9% | 361 | 10.0% | 8.0% | +109 | +1.2pp |
| Elderly aged (85 and over) | 110 | 2.6% | 1.6% | 126 | 3.5% | 2.2% | -16 | -0.9pp |
| Total | 4,180 | 100.0% | 100.0% | 3,596 | 100.0% | 100.0% | +584 | 0.0pp |