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 Yanchep, accounting for 20.5% (2,261 people). This share was lower than Wanneroo (C) (21.7%). Since 2016, the biggest change was in Older workers and pre-retirees (50 to 59), which increased by 388 people and 1.4 percentage points.
Section overview
Age structure - Service age groups
Yanchep - Total persons (Usual residence)
This table summarises service age groups for Yanchep in 2021 for persons, with comparison against Wanneroo (C) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Yanchep, with comparison markers for Wanneroo (C).
Babies and pre-schoolers (0 to 4)
2021 count
898
% of total
8.1%
Change from 2016
-1.0pp
898
8.1%
-1.0pp
Primary schoolers (5 to 11)
2021 count
1,353
% of total
12.3%
Change from 2016
+0.8pp
1,353
12.3%
+0.8pp
Secondary schoolers (12 to 17)
2021 count
939
% of total
8.5%
Change from 2016
+1.3pp
939
8.5%
+1.3pp
Tertiary education and independence (18 to 24)
2021 count
764
% of total
6.9%
Change from 2016
-0.9pp
764
6.9%
-0.9pp
Young workforce (25 to 34)
2021 count
1,494
% of total
13.6%
Change from 2016
-1.7pp
1,494
13.6%
-1.7pp
Parents and homebuilders (35 to 49)
2021 count
2,261
% of total
20.5%
Change from 2016
-1.3pp
2,261
20.5%
-1.3pp
Older workers and pre-retirees (50 to 59)
2021 count
1,333
% of total
12.1%
Change from 2016
+1.4pp
1,333
12.1%
+1.4pp
Empty nesters and retirees (60 to 69)
2021 count
950
% of total
8.6%
Change from 2016
+0.5pp
950
8.6%
+0.5pp
Seniors (70 to 84)
2021 count
914
% of total
8.3%
Change from 2016
+1.3pp
914
8.3%
+1.3pp
Elderly aged (85 and over)
2021 count
151
% of total
1.4%
Change from 2016
0.0pp
151
1.4%
0.0pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
+90
-1.0pp
Primary schoolers (5 to 11)
+329
+0.8pp
Secondary schoolers (12 to 17)
+297
+1.3pp
Tertiary education and independence (18 to 24)
+69
-0.9pp
Young workforce (25 to 34)
+137
-1.7pp
Parents and homebuilders (35 to 49)
+331
-1.3pp
Older workers and pre-retirees (50 to 59)
+388
+1.4pp
Empty nesters and retirees (60 to 69)
+228
+0.5pp
Seniors (70 to 84)
+296
+1.3pp
Elderly aged (85 and over)
+24
0.0pp
Data table
Service age groups for Yanchep. 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) | 898 | 8.1% | 7.1% | 808 | 9.1% | 8.0% | +90 | -1.0pp |
| Primary schoolers (5 to 11) | 1,353 | 12.3% | 10.6% | 1,024 | 11.5% | 10.8% | +329 | +0.8pp |
| Secondary schoolers (12 to 17) | 939 | 8.5% | 8.5% | 642 | 7.2% | 8.5% | +297 | +1.3pp |
| Tertiary education and independence (18 to 24) | 764 | 6.9% | 9.0% | 695 | 7.8% | 9.6% | +69 | -0.9pp |
| Young workforce (25 to 34) | 1,494 | 13.6% | 13.9% | 1,357 | 15.3% | 15.7% | +137 | -1.7pp |
| Parents and homebuilders (35 to 49) | 2,261 | 20.5% | 21.7% | 1,930 | 21.8% | 22.4% | +331 | -1.3pp |
| Older workers and pre-retirees (50 to 59) | 1,333 | 12.1% | 12.5% | 945 | 10.7% | 11.2% | +388 | +1.4pp |
| Empty nesters and retirees (60 to 69) | 950 | 8.6% | 8.5% | 722 | 8.1% | 7.4% | +228 | +0.5pp |
| Seniors (70 to 84) | 914 | 8.3% | 7.0% | 618 | 7.0% | 5.4% | +296 | +1.3pp |
| Elderly aged (85 and over) | 151 | 1.4% | 1.3% | 127 | 1.4% | 1.0% | +24 | 0.0pp |
| Total | 11,022 | 100.0% | 100.0% | 8,868 | 100.0% | 100.0% | +2,154 | 0.0pp |