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 Koondoola, accounting for 19.5% (766 people). This share was lower than Wanneroo (C) (21.7%). Since 2016, the biggest change was in Young workforce (25 to 34), which decreased by 95 people and 1.9 percentage points.
Section overview
Age structure - Service age groups
Koondoola - Total persons (Usual residence)
This table summarises service age groups for Koondoola in 2021 for persons, with comparison against Wanneroo (C) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Koondoola, with comparison markers for Wanneroo (C).
Babies and pre-schoolers (0 to 4)
2021 count
250
% of total
6.4%
Change from 2016
-1.3pp
250
6.4%
-1.3pp
Primary schoolers (5 to 11)
2021 count
394
% of total
10.1%
Change from 2016
-0.9pp
394
10.1%
-0.9pp
Secondary schoolers (12 to 17)
2021 count
341
% of total
8.7%
Change from 2016
+0.8pp
341
8.7%
+0.8pp
Tertiary education and independence (18 to 24)
2021 count
440
% of total
11.2%
Change from 2016
+0.7pp
440
11.2%
+0.7pp
Young workforce (25 to 34)
2021 count
499
% of total
12.7%
Change from 2016
-1.9pp
499
12.7%
-1.9pp
Parents and homebuilders (35 to 49)
2021 count
766
% of total
19.5%
Change from 2016
0.0pp
766
19.5%
0.0pp
Older workers and pre-retirees (50 to 59)
2021 count
442
% of total
11.3%
Change from 2016
+0.6pp
442
11.3%
+0.6pp
Empty nesters and retirees (60 to 69)
2021 count
359
% of total
9.2%
Change from 2016
-0.8pp
359
9.2%
-0.8pp
Seniors (70 to 84)
2021 count
381
% of total
9.7%
Change from 2016
+2.5pp
381
9.7%
+2.5pp
Elderly aged (85 and over)
2021 count
46
% of total
1.2%
Change from 2016
+0.5pp
46
1.2%
+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)
-61
-1.3pp
Primary schoolers (5 to 11)
-51
-0.9pp
Secondary schoolers (12 to 17)
+21
+0.8pp
Tertiary education and independence (18 to 24)
+16
+0.7pp
Young workforce (25 to 34)
-95
-1.9pp
Parents and homebuilders (35 to 49)
-26
0.0pp
Older workers and pre-retirees (50 to 59)
+8
+0.6pp
Empty nesters and retirees (60 to 69)
-46
-0.8pp
Seniors (70 to 84)
+91
+2.5pp
Elderly aged (85 and over)
+19
+0.5pp
Data table
Service age groups for Koondoola. Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Wanneroo (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Wanneroo (C)% | Count | % | Wanneroo (C)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 250 | 6.4% | 7.1% | 311 | 7.7% | 8.0% | -61 | -1.3pp |
| Primary schoolers (5 to 11) | 394 | 10.1% | 10.6% | 445 | 11.0% | 10.8% | -51 | -0.9pp |
| Secondary schoolers (12 to 17) | 341 | 8.7% | 8.5% | 320 | 7.9% | 8.5% | +21 | +0.8pp |
| Tertiary education and independence (18 to 24) | 440 | 11.2% | 9.0% | 424 | 10.5% | 9.6% | +16 | +0.7pp |
| Young workforce (25 to 34) | 499 | 12.7% | 13.9% | 594 | 14.6% | 15.7% | -95 | -1.9pp |
| Parents and homebuilders (35 to 49) | 766 | 19.5% | 21.7% | 792 | 19.5% | 22.4% | -26 | 0.0pp |
| Older workers and pre-retirees (50 to 59) | 442 | 11.3% | 12.5% | 434 | 10.7% | 11.2% | +8 | +0.6pp |
| Empty nesters and retirees (60 to 69) | 359 | 9.2% | 8.5% | 405 | 10.0% | 7.4% | -46 | -0.8pp |
| Seniors (70 to 84) | 381 | 9.7% | 7.0% | 290 | 7.2% | 5.4% | +91 | +2.5pp |
| Elderly aged (85 and over) | 46 | 1.2% | 1.3% | 27 | 0.7% | 1.0% | +19 | +0.5pp |
| Total | 3,919 | 100.0% | 100.0% | 4,055 | 100.0% | 100.0% | -136 | 0.0pp |