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 Niddrie, accounting for 22.3% (1,317 people). This share was higher than Moonee Valley (C) (21.3%). Since 2016, the biggest change was in Parents and homebuilders (35 to 49), which increased by 1,294 people and 7.7 percentage points.
Section overview
Age structure - Service age groups
Niddrie - Total persons (Usual residence)
This table summarises service age groups for Niddrie in 2021 for persons, with comparison against Moonee Valley (C) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Niddrie, with comparison markers for Moonee Valley (C).
Babies and pre-schoolers (0 to 4)
2021 count
317
% of total
5.4%
Change from 2016
+1.6pp
317
5.4%
+1.6pp
Primary schoolers (5 to 11)
2021 count
509
% of total
8.6%
Change from 2016
+4.8pp
509
8.6%
+4.8pp
Secondary schoolers (12 to 17)
2021 count
458
% of total
7.8%
Change from 2016
+1.4pp
458
7.8%
+1.4pp
Tertiary education and independence (18 to 24)
2021 count
503
% of total
8.5%
Change from 2016
+4.7pp
503
8.5%
+4.7pp
Young workforce (25 to 34)
2021 count
708
% of total
12.0%
Change from 2016
+5.6pp
708
12.0%
+5.6pp
Parents and homebuilders (35 to 49)
2021 count
1,317
% of total
22.3%
Change from 2016
+7.7pp
1,317
22.3%
+7.7pp
Older workers and pre-retirees (50 to 59)
2021 count
872
% of total
14.8%
Change from 2016
-7.5pp
872
14.8%
-7.5pp
Empty nesters and retirees (60 to 69)
2021 count
552
% of total
9.4%
Change from 2016
-4.6pp
552
9.4%
-4.6pp
Seniors (70 to 84)
2021 count
515
% of total
8.7%
Change from 2016
-3.4pp
515
8.7%
-3.4pp
Elderly aged (85 and over)
2021 count
173
% of total
2.9%
Change from 2016
+2.9pp
173
2.9%
+2.9pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
+311
+1.6pp
Primary schoolers (5 to 11)
+503
+4.8pp
Secondary schoolers (12 to 17)
+448
+1.4pp
Tertiary education and independence (18 to 24)
+497
+4.7pp
Young workforce (25 to 34)
+698
+5.6pp
Parents and homebuilders (35 to 49)
+1,294
+7.7pp
Older workers and pre-retirees (50 to 59)
+837
-7.5pp
Empty nesters and retirees (60 to 69)
+530
-4.6pp
Seniors (70 to 84)
+496
-3.4pp
Elderly aged (85 and over)
+173
+2.9pp
Data table
Service age groups for Niddrie. Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Moonee Valley (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Moonee Valley (C)% | Count | % | Moonee Valley (C)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 317 | 5.4% | 5.0% | 6 | 3.8% | 5.7% | +311 | +1.6pp |
| Primary schoolers (5 to 11) | 509 | 8.6% | 7.7% | 6 | 3.8% | 7.9% | +503 | +4.8pp |
| Secondary schoolers (12 to 17) | 458 | 7.8% | 6.5% | 10 | 6.4% | 6.4% | +448 | +1.4pp |
| Tertiary education and independence (18 to 24) | 503 | 8.5% | 8.5% | 6 | 3.8% | 9.1% | +497 | +4.7pp |
| Young workforce (25 to 34) | 708 | 12.0% | 15.2% | 10 | 6.4% | 16.0% | +698 | +5.6pp |
| Parents and homebuilders (35 to 49) | 1,317 | 22.3% | 21.3% | 23 | 14.6% | 21.6% | +1,294 | +7.7pp |
| Older workers and pre-retirees (50 to 59) | 872 | 14.8% | 13.0% | 35 | 22.3% | 12.2% | +837 | -7.5pp |
| Empty nesters and retirees (60 to 69) | 552 | 9.4% | 10.3% | 22 | 14.0% | 9.6% | +530 | -4.6pp |
| Seniors (70 to 84) | 515 | 8.7% | 9.9% | 19 | 12.1% | 9.0% | +496 | -3.4pp |
| Elderly aged (85 and over) | 173 | 2.9% | 2.7% | 0 | 0.0% | 2.5% | +173 | +2.9pp |
| Total | 5,901 | 100.0% | 100.0% | 157 | 100.0% | 100.0% | +5,744 | 0.0pp |