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, Older workers and pre-retirees (50 to 59) was the most common category among residents in Lysterfield (part), accounting for 19.3% (1,292 people). This share was higher than Knox (C) (13.5%). Since 2016, the biggest change was in Older workers and pre-retirees (50 to 59), which increased by 1,289 people and 4.3 percentage points.
Section overview
Age structure - Service age groups
Lysterfield (part) - Total persons (Usual residence)
This table summarises service age groups for Lysterfield (part) in 2021 for persons, with comparison against Knox (C) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Lysterfield (part), with comparison markers for Knox (C).
Babies and pre-schoolers (0 to 4)
2021 count
289
% of total
4.3%
Change from 2016
+4.3pp
289
4.3%
+4.3pp
Primary schoolers (5 to 11)
2021 count
576
% of total
8.6%
Change from 2016
+8.6pp
576
8.6%
+8.6pp
Secondary schoolers (12 to 17)
2021 count
599
% of total
9.0%
Change from 2016
+9.0pp
599
9.0%
+9.0pp
Tertiary education and independence (18 to 24)
2021 count
768
% of total
11.5%
Change from 2016
+11.5pp
768
11.5%
+11.5pp
Young workforce (25 to 34)
2021 count
631
% of total
9.4%
Change from 2016
+9.4pp
631
9.4%
+9.4pp
Parents and homebuilders (35 to 49)
2021 count
1,281
% of total
19.2%
Change from 2016
+19.2pp
1,281
19.2%
+19.2pp
Older workers and pre-retirees (50 to 59)
2021 count
1,292
% of total
19.3%
Change from 2016
+4.3pp
1,292
19.3%
+4.3pp
Empty nesters and retirees (60 to 69)
2021 count
802
% of total
12.0%
Change from 2016
+12.0pp
802
12.0%
+12.0pp
Seniors (70 to 84)
2021 count
399
% of total
6.0%
Change from 2016
-9.0pp
399
6.0%
-9.0pp
Elderly aged (85 and over)
2021 count
50
% of total
0.7%
Change from 2016
+0.7pp
50
0.7%
+0.7pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
+289
+4.3pp
Primary schoolers (5 to 11)
+576
+8.6pp
Secondary schoolers (12 to 17)
+599
+9.0pp
Tertiary education and independence (18 to 24)
+768
+11.5pp
Young workforce (25 to 34)
+631
+9.4pp
Parents and homebuilders (35 to 49)
+1,281
+19.2pp
Older workers and pre-retirees (50 to 59)
+1,289
+4.3pp
Empty nesters and retirees (60 to 69)
+802
+12.0pp
Seniors (70 to 84)
+396
-9.0pp
Elderly aged (85 and over)
+50
+0.7pp
Data table
Service age groups for Lysterfield (part). 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) | 289 | 4.3% | 5.3% | 0 | 0.0% | 5.9% | +289 | +4.3pp |
| Primary schoolers (5 to 11) | 576 | 8.6% | 8.2% | 0 | 0.0% | 8.2% | +576 | +8.6pp |
| Secondary schoolers (12 to 17) | 599 | 9.0% | 7.0% | 0 | 0.0% | 7.3% | +599 | +9.0pp |
| Tertiary education and independence (18 to 24) | 768 | 11.5% | 8.4% | 0 | 0.0% | 9.3% | +768 | +11.5pp |
| Young workforce (25 to 34) | 631 | 9.4% | 12.7% | 0 | 0.0% | 13.2% | +631 | +9.4pp |
| Parents and homebuilders (35 to 49) | 1,281 | 19.2% | 20.7% | 0 | 0.0% | 20.6% | +1,281 | +19.2pp |
| Older workers and pre-retirees (50 to 59) | 1,292 | 19.3% | 13.5% | 3 | 15.0% | 14.0% | +1,289 | +4.3pp |
| Empty nesters and retirees (60 to 69) | 802 | 12.0% | 11.6% | 0 | 0.0% | 11.3% | +802 | +12.0pp |
| Seniors (70 to 84) | 399 | 6.0% | 10.2% | 3 | 15.0% | 8.3% | +396 | -9.0pp |
| Elderly aged (85 and over) | 50 | 0.7% | 2.2% | 0 | 0.0% | 2.0% | +50 | +0.7pp |
| Total | 6,681 | 100.0% | 100.0% | 20 | 100.0% | 100.0% | +6,661 | 0.0pp |