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 Greenfield Park, accounting for 17.7% (956 people). This share was lower than Fairfield (C) (18.4%). Since 2016, the biggest change was in Parents and homebuilders (35 to 49), which increased by 837 people and 0.3 percentage points.
Section overview
Age structure - Service age groups
Greenfield Park - Total persons (Usual residence)
This table summarises service age groups for Greenfield Park in 2021 for persons, with comparison against Fairfield (C) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Greenfield Park, with comparison markers for Fairfield (C).
Babies and pre-schoolers (0 to 4)
2021 count
283
% of total
5.2%
Change from 2016
+3.6pp
283
5.2%
+3.6pp
Primary schoolers (5 to 11)
2021 count
461
% of total
8.5%
Change from 2016
+0.6pp
461
8.5%
+0.6pp
Secondary schoolers (12 to 17)
2021 count
470
% of total
8.7%
Change from 2016
+0.7pp
470
8.7%
+0.7pp
Tertiary education and independence (18 to 24)
2021 count
573
% of total
10.6%
Change from 2016
+0.8pp
573
10.6%
+0.8pp
Young workforce (25 to 34)
2021 count
654
% of total
12.1%
Change from 2016
+5.7pp
654
12.1%
+5.7pp
Parents and homebuilders (35 to 49)
2021 count
956
% of total
17.7%
Change from 2016
+0.3pp
956
17.7%
+0.3pp
Older workers and pre-retirees (50 to 59)
2021 count
726
% of total
13.5%
Change from 2016
-6.4pp
726
13.5%
-6.4pp
Empty nesters and retirees (60 to 69)
2021 count
671
% of total
12.4%
Change from 2016
-4.1pp
671
12.4%
-4.1pp
Seniors (70 to 84)
2021 count
516
% of total
9.6%
Change from 2016
-0.5pp
516
9.6%
-0.5pp
Elderly aged (85 and over)
2021 count
77
% of total
1.4%
Change from 2016
+1.0pp
77
1.4%
+1.0pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
+272
+3.6pp
Primary schoolers (5 to 11)
+407
+0.6pp
Secondary schoolers (12 to 17)
+415
+0.7pp
Tertiary education and independence (18 to 24)
+506
+0.8pp
Young workforce (25 to 34)
+610
+5.7pp
Parents and homebuilders (35 to 49)
+837
+0.3pp
Older workers and pre-retirees (50 to 59)
+590
-6.4pp
Empty nesters and retirees (60 to 69)
+558
-4.1pp
Seniors (70 to 84)
+447
-0.5pp
Elderly aged (85 and over)
+74
+1.0pp
Data table
Service age groups for Greenfield Park. Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Fairfield (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Fairfield (C)% | Count | % | Fairfield (C)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 283 | 5.2% | 5.2% | 11 | 1.6% | 6.1% | +272 | +3.6pp |
| Primary schoolers (5 to 11) | 461 | 8.5% | 8.6% | 54 | 7.9% | 9.0% | +407 | +0.6pp |
| Secondary schoolers (12 to 17) | 470 | 8.7% | 8.2% | 55 | 8.0% | 8.2% | +415 | +0.7pp |
| Tertiary education and independence (18 to 24) | 573 | 10.6% | 9.9% | 67 | 9.8% | 10.7% | +506 | +0.8pp |
| Young workforce (25 to 34) | 654 | 12.1% | 13.0% | 44 | 6.4% | 13.6% | +610 | +5.7pp |
| Parents and homebuilders (35 to 49) | 956 | 17.7% | 18.4% | 119 | 17.4% | 19.3% | +837 | +0.3pp |
| Older workers and pre-retirees (50 to 59) | 726 | 13.5% | 13.4% | 136 | 19.9% | 13.6% | +590 | -6.4pp |
| Empty nesters and retirees (60 to 69) | 671 | 12.4% | 12.1% | 113 | 16.5% | 10.3% | +558 | -4.1pp |
| Seniors (70 to 84) | 516 | 9.6% | 9.2% | 69 | 10.1% | 7.4% | +447 | -0.5pp |
| Elderly aged (85 and over) | 77 | 1.4% | 2.1% | 3 | 0.4% | 1.8% | +74 | +1.0pp |
| Total | 5,394 | 100.0% | 100.0% | 684 | 100.0% | 100.0% | +4,710 | 0.0pp |