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 Yan Yean, accounting for 16.7% (41 people). This share was higher than Whittlesea (C) (7.4%). Since 2016, the biggest change was in Parents and homebuilders (35 to 49), which decreased by 244 people and 2.4 percentage points.
Section overview
Age structure - Service age groups
Yan Yean - Total persons (Usual residence)
This table summarises service age groups for Yan Yean in 2021 for persons, with comparison against Whittlesea (C) and change since 2016.
Chart view
Age structure - Service age groups snapshot
2021 distribution by category for Yan Yean, with comparison markers for Whittlesea (C).
Babies and pre-schoolers (0 to 4)
2021 count
0
% of total
0.0%
Change from 2016
-6.6pp
0
0.0%
-6.6pp
Primary schoolers (5 to 11)
2021 count
14
% of total
5.7%
Change from 2016
-2.7pp
14
5.7%
-2.7pp
Secondary schoolers (12 to 17)
2021 count
19
% of total
7.7%
Change from 2016
+2.5pp
19
7.7%
+2.5pp
Tertiary education and independence (18 to 24)
2021 count
16
% of total
6.5%
Change from 2016
-0.7pp
16
6.5%
-0.7pp
Young workforce (25 to 34)
2021 count
36
% of total
14.6%
Change from 2016
+1.9pp
36
14.6%
+1.9pp
Parents and homebuilders (35 to 49)
2021 count
36
% of total
14.6%
Change from 2016
-2.4pp
36
14.6%
-2.4pp
Older workers and pre-retirees (50 to 59)
2021 count
36
% of total
14.6%
Change from 2016
-0.9pp
36
14.6%
-0.9pp
Empty nesters and retirees (60 to 69)
2021 count
37
% of total
15.0%
Change from 2016
+0.6pp
37
15.0%
+0.6pp
Seniors (70 to 84)
2021 count
41
% of total
16.7%
Change from 2016
+5.4pp
41
16.7%
+5.4pp
Elderly aged (85 and over)
2021 count
0
% of total
0.0%
Change from 2016
-1.3pp
0
0.0%
-1.3pp
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
-109
-6.6pp
Primary schoolers (5 to 11)
-124
-2.7pp
Secondary schoolers (12 to 17)
-67
+2.5pp
Tertiary education and independence (18 to 24)
-103
-0.7pp
Young workforce (25 to 34)
-174
+1.9pp
Parents and homebuilders (35 to 49)
-244
-2.4pp
Older workers and pre-retirees (50 to 59)
-219
-0.9pp
Empty nesters and retirees (60 to 69)
-201
+0.6pp
Seniors (70 to 84)
-146
+5.4pp
Elderly aged (85 and over)
-21
-1.3pp
Data table
Service age groups for Yan Yean. Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Whittlesea (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Whittlesea (C)% | Count | % | Whittlesea (C)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 0 | 0.0% | 7.2% | 109 | 6.6% | 8.2% | -109 | -6.6pp |
| Primary schoolers (5 to 11) | 14 | 5.7% | 10.2% | 138 | 8.4% | 9.6% | -124 | -2.7pp |
| Secondary schoolers (12 to 17) | 19 | 7.7% | 7.3% | 86 | 5.2% | 7.0% | -67 | +2.5pp |
| Tertiary education and independence (18 to 24) | 16 | 6.5% | 8.5% | 119 | 7.2% | 9.3% | -103 | -0.7pp |
| Young workforce (25 to 34) | 36 | 14.6% | 15.6% | 210 | 12.7% | 17.1% | -174 | +1.9pp |
| Parents and homebuilders (35 to 49) | 36 | 14.6% | 22.6% | 280 | 17.0% | 21.4% | -244 | -2.4pp |
| Older workers and pre-retirees (50 to 59) | 36 | 14.6% | 11.0% | 255 | 15.5% | 11.1% | -219 | -0.9pp |
| Empty nesters and retirees (60 to 69) | 37 | 15.0% | 8.7% | 238 | 14.4% | 8.6% | -201 | +0.6pp |
| Seniors (70 to 84) | 41 | 16.7% | 7.4% | 187 | 11.3% | 6.5% | -146 | +5.4pp |
| Elderly aged (85 and over) | 0 | 0.0% | 1.5% | 21 | 1.3% | 1.2% | -21 | -1.3pp |
| Total | 246 | 100.0% | 100.0% | 1,650 | 100.0% | 100.0% | -1,404 | 0.0pp |