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 Lethbridge Park, accounting for 17% (804 people). This share was lower than Blacktown (C) (23.4%). Since 2016, the biggest change was in Young workforce (25 to 34), which decreased by 3,854 people and 9 percentage points.
Section overview
Age structure - Service age groups
Lethbridge Park - Total persons (Usual residence)
This table summarises service age groups for Lethbridge Park in 2021 for persons, with comparison against Blacktown (C) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Lethbridge Park, with comparison markers for Blacktown (C).
Babies and pre-schoolers (0 to 4)
2021 count
377
% of total
8.0%
Change from 2016
+2.0pp
377
8.0%
+2.0pp
Primary schoolers (5 to 11)
2021 count
529
% of total
11.2%
Change from 2016
+5.0pp
529
11.2%
+5.0pp
Secondary schoolers (12 to 17)
2021 count
427
% of total
9.0%
Change from 2016
+3.8pp
427
9.0%
+3.8pp
Tertiary education and independence (18 to 24)
2021 count
501
% of total
10.6%
Change from 2016
-1.8pp
501
10.6%
-1.8pp
Young workforce (25 to 34)
2021 count
661
% of total
14.0%
Change from 2016
-9.0pp
661
14.0%
-9.0pp
Parents and homebuilders (35 to 49)
2021 count
804
% of total
17.0%
Change from 2016
-2.6pp
804
17.0%
-2.6pp
Older workers and pre-retirees (50 to 59)
2021 count
565
% of total
11.9%
Change from 2016
-1.0pp
565
11.9%
-1.0pp
Empty nesters and retirees (60 to 69)
2021 count
358
% of total
7.6%
Change from 2016
-0.7pp
358
7.6%
-0.7pp
Seniors (70 to 84)
2021 count
420
% of total
8.9%
Change from 2016
+3.8pp
420
8.9%
+3.8pp
Elderly aged (85 and over)
2021 count
40
% of total
0.8%
Change from 2016
-0.5pp
40
0.8%
-0.5pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
-800
+2.0pp
Primary schoolers (5 to 11)
-689
+5.0pp
Secondary schoolers (12 to 17)
-584
+3.8pp
Tertiary education and independence (18 to 24)
-1,926
-1.8pp
Young workforce (25 to 34)
-3,854
-9.0pp
Parents and homebuilders (35 to 49)
-3,036
-2.6pp
Older workers and pre-retirees (50 to 59)
-1,968
-1.0pp
Empty nesters and retirees (60 to 69)
-1,274
-0.7pp
Seniors (70 to 84)
-588
+3.8pp
Elderly aged (85 and over)
-218
-0.5pp
Data table
Service age groups for Lethbridge Park. Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Blacktown (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Blacktown (C)% | Count | % | Blacktown (C)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 377 | 8.0% | 7.5% | 1,177 | 6.0% | 8.0% | -800 | +2.0pp |
| Primary schoolers (5 to 11) | 529 | 11.2% | 10.9% | 1,218 | 6.2% | 10.8% | -689 | +5.0pp |
| Secondary schoolers (12 to 17) | 427 | 9.0% | 8.0% | 1,011 | 5.2% | 8.2% | -584 | +3.8pp |
| Tertiary education and independence (18 to 24) | 501 | 10.6% | 9.1% | 2,427 | 12.4% | 9.5% | -1,926 | -1.8pp |
| Young workforce (25 to 34) | 661 | 14.0% | 14.9% | 4,515 | 23.0% | 15.5% | -3,854 | -9.0pp |
| Parents and homebuilders (35 to 49) | 804 | 17.0% | 23.4% | 3,840 | 19.6% | 21.7% | -3,036 | -2.6pp |
| Older workers and pre-retirees (50 to 59) | 565 | 11.9% | 10.7% | 2,533 | 12.9% | 11.4% | -1,968 | -1.0pp |
| Empty nesters and retirees (60 to 69) | 358 | 7.6% | 8.2% | 1,632 | 8.3% | 8.4% | -1,274 | -0.7pp |
| Seniors (70 to 84) | 420 | 8.9% | 6.2% | 1,008 | 5.1% | 5.4% | -588 | +3.8pp |
| Elderly aged (85 and over) | 40 | 0.8% | 1.1% | 258 | 1.3% | 1.1% | -218 | -0.5pp |
| Total | 4,730 | 100.0% | 100.0% | 19,627 | 100.0% | 100.0% | -14,897 | 0.0pp |