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 Lilyfield, accounting for 25.5% (1,952 people). This share was higher than Inner West (A) (24.2%). Since 2016, the biggest change was in Parents and homebuilders (35 to 49), which increased by 1,942 people and 9.9 percentage points.
Section overview
Age structure - Service age groups
Lilyfield - Total persons (Usual residence)
This table summarises service age groups for Lilyfield in 2021 for persons, with comparison against Inner West (A) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Lilyfield, with comparison markers for Inner West (A).
Babies and pre-schoolers (0 to 4)
2021 count
500
% of total
6.5%
Change from 2016
+6.5pp
500
6.5%
+6.5pp
Primary schoolers (5 to 11)
2021 count
707
% of total
9.3%
Change from 2016
-6.3pp
707
9.3%
-6.3pp
Secondary schoolers (12 to 17)
2021 count
557
% of total
7.3%
Change from 2016
+7.3pp
557
7.3%
+7.3pp
Tertiary education and independence (18 to 24)
2021 count
468
% of total
6.1%
Change from 2016
+6.1pp
468
6.1%
+6.1pp
Young workforce (25 to 34)
2021 count
801
% of total
10.5%
Change from 2016
+1.1pp
801
10.5%
+1.1pp
Parents and homebuilders (35 to 49)
2021 count
1,952
% of total
25.5%
Change from 2016
+9.9pp
1,952
25.5%
+9.9pp
Older workers and pre-retirees (50 to 59)
2021 count
1,165
% of total
15.2%
Change from 2016
+15.2pp
1,165
15.2%
+15.2pp
Empty nesters and retirees (60 to 69)
2021 count
754
% of total
9.9%
Change from 2016
+5.2pp
754
9.9%
+5.2pp
Seniors (70 to 84)
2021 count
590
% of total
7.7%
Change from 2016
+3.0pp
590
7.7%
+3.0pp
Elderly aged (85 and over)
2021 count
162
% of total
2.1%
Change from 2016
-2.6pp
162
2.1%
-2.6pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
+500
+6.5pp
Primary schoolers (5 to 11)
+697
-6.3pp
Secondary schoolers (12 to 17)
+557
+7.3pp
Tertiary education and independence (18 to 24)
+468
+6.1pp
Young workforce (25 to 34)
+795
+1.1pp
Parents and homebuilders (35 to 49)
+1,942
+9.9pp
Older workers and pre-retirees (50 to 59)
+1,165
+15.2pp
Empty nesters and retirees (60 to 69)
+751
+5.2pp
Seniors (70 to 84)
+587
+3.0pp
Elderly aged (85 and over)
+159
-2.6pp
Data table
Service age groups for Lilyfield. Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Inner West (A).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Inner West (A)% | Count | % | Inner West (A)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 500 | 6.5% | 5.0% | 0 | 0.0% | 5.9% | +500 | +6.5pp |
| Primary schoolers (5 to 11) | 707 | 9.3% | 6.8% | 10 | 15.6% | 7.1% | +697 | -6.3pp |
| Secondary schoolers (12 to 17) | 557 | 7.3% | 5.3% | 0 | 0.0% | 4.6% | +557 | +7.3pp |
| Tertiary education and independence (18 to 24) | 468 | 6.1% | 7.8% | 0 | 0.0% | 8.5% | +468 | +6.1pp |
| Young workforce (25 to 34) | 801 | 10.5% | 19.3% | 6 | 9.4% | 20.3% | +795 | +1.1pp |
| Parents and homebuilders (35 to 49) | 1,952 | 25.5% | 24.2% | 10 | 15.6% | 24.8% | +1,942 | +9.9pp |
| Older workers and pre-retirees (50 to 59) | 1,165 | 15.2% | 12.7% | 0 | 0.0% | 12.0% | +1,165 | +15.2pp |
| Empty nesters and retirees (60 to 69) | 754 | 9.9% | 9.1% | 3 | 4.7% | 8.6% | +751 | +5.2pp |
| Seniors (70 to 84) | 590 | 7.7% | 7.9% | 3 | 4.7% | 6.6% | +587 | +3.0pp |
| Elderly aged (85 and over) | 162 | 2.1% | 2.0% | 3 | 4.7% | 1.7% | +159 | -2.6pp |
| Total | 7,641 | 100.0% | 100.0% | 64 | 100.0% | 100.0% | +7,577 | 0.0pp |