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 Bayswater (Vic.), accounting for 21.8% (2,670 people). This share was higher than Knox (C) (20.7%). Since 2016, the biggest change was in Parents and homebuilders (35 to 49), which increased by 786 people and 0.4 percentage points.
Section overview
Age structure - Service age groups
Bayswater (Vic.) - Total persons (Usual residence)
This table summarises service age groups for Bayswater (Vic.) in 2021 for persons, with comparison against Knox (C) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Bayswater (Vic.), with comparison markers for Knox (C).
Babies and pre-schoolers (0 to 4)
2021 count
708
% of total
5.8%
Change from 2016
-1.5pp
708
5.8%
-1.5pp
Primary schoolers (5 to 11)
2021 count
935
% of total
7.6%
Change from 2016
-0.6pp
935
7.6%
-0.6pp
Secondary schoolers (12 to 17)
2021 count
703
% of total
5.7%
Change from 2016
-0.4pp
703
5.7%
-0.4pp
Tertiary education and independence (18 to 24)
2021 count
931
% of total
7.6%
Change from 2016
-0.4pp
931
7.6%
-0.4pp
Young workforce (25 to 34)
2021 count
2,007
% of total
16.4%
Change from 2016
-0.4pp
2,007
16.4%
-0.4pp
Parents and homebuilders (35 to 49)
2021 count
2,670
% of total
21.8%
Change from 2016
+0.4pp
2,670
21.8%
+0.4pp
Older workers and pre-retirees (50 to 59)
2021 count
1,437
% of total
11.7%
Change from 2016
-0.5pp
1,437
11.7%
-0.5pp
Empty nesters and retirees (60 to 69)
2021 count
1,176
% of total
9.6%
Change from 2016
-0.8pp
1,176
9.6%
-0.8pp
Seniors (70 to 84)
2021 count
1,314
% of total
10.7%
Change from 2016
+4.2pp
1,314
10.7%
+4.2pp
Elderly aged (85 and over)
2021 count
355
% of total
2.9%
Change from 2016
0.0pp
355
2.9%
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)
+63
-1.5pp
Primary schoolers (5 to 11)
+211
-0.6pp
Secondary schoolers (12 to 17)
+166
-0.4pp
Tertiary education and independence (18 to 24)
+228
-0.4pp
Young workforce (25 to 34)
+532
-0.4pp
Parents and homebuilders (35 to 49)
+786
+0.4pp
Older workers and pre-retirees (50 to 59)
+361
-0.5pp
Empty nesters and retirees (60 to 69)
+261
-0.8pp
Seniors (70 to 84)
+743
+4.2pp
Elderly aged (85 and over)
+100
0.0pp
Data table
Service age groups for Bayswater (Vic.). Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Knox (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Knox (C)% | Count | % | Knox (C)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 708 | 5.8% | 5.3% | 645 | 7.3% | 5.9% | +63 | -1.5pp |
| Primary schoolers (5 to 11) | 935 | 7.6% | 8.2% | 724 | 8.2% | 8.2% | +211 | -0.6pp |
| Secondary schoolers (12 to 17) | 703 | 5.7% | 7.0% | 537 | 6.1% | 7.3% | +166 | -0.4pp |
| Tertiary education and independence (18 to 24) | 931 | 7.6% | 8.4% | 703 | 8.0% | 9.3% | +228 | -0.4pp |
| Young workforce (25 to 34) | 2,007 | 16.4% | 12.7% | 1,475 | 16.8% | 13.2% | +532 | -0.4pp |
| Parents and homebuilders (35 to 49) | 2,670 | 21.8% | 20.7% | 1,884 | 21.4% | 20.6% | +786 | +0.4pp |
| Older workers and pre-retirees (50 to 59) | 1,437 | 11.7% | 13.5% | 1,076 | 12.2% | 14.0% | +361 | -0.5pp |
| Empty nesters and retirees (60 to 69) | 1,176 | 9.6% | 11.6% | 915 | 10.4% | 11.3% | +261 | -0.8pp |
| Seniors (70 to 84) | 1,314 | 10.7% | 10.2% | 571 | 6.5% | 8.3% | +743 | +4.2pp |
| Elderly aged (85 and over) | 355 | 2.9% | 2.2% | 255 | 2.9% | 2.0% | +100 | 0.0pp |
| Total | 12,262 | 100.0% | 100.0% | 8,789 | 100.0% | 100.0% | +3,473 | 0.0pp |