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 Montmorency, accounting for 22.3% (2,062 people). This share was higher than Banyule (C) (21.3%). Since 2016, the biggest change was in Seniors (70 to 84), which increased by 257 people and 2.5 percentage points.
Section overview
Age structure - Service age groups
Montmorency - Total persons (Usual residence)
This table summarises service age groups for Montmorency in 2021 for persons, with comparison against Banyule (C) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Montmorency, with comparison markers for Banyule (C).
Babies and pre-schoolers (0 to 4)
2021 count
578
% of total
6.2%
Change from 2016
-0.9pp
578
6.2%
-0.9pp
Primary schoolers (5 to 11)
2021 count
916
% of total
9.9%
Change from 2016
+0.9pp
916
9.9%
+0.9pp
Secondary schoolers (12 to 17)
2021 count
659
% of total
7.1%
Change from 2016
+0.5pp
659
7.1%
+0.5pp
Tertiary education and independence (18 to 24)
2021 count
567
% of total
6.1%
Change from 2016
-0.7pp
567
6.1%
-0.7pp
Young workforce (25 to 34)
2021 count
913
% of total
9.9%
Change from 2016
-2.1pp
913
9.9%
-2.1pp
Parents and homebuilders (35 to 49)
2021 count
2,062
% of total
22.3%
Change from 2016
-0.9pp
2,062
22.3%
-0.9pp
Older workers and pre-retirees (50 to 59)
2021 count
1,128
% of total
12.2%
Change from 2016
-0.3pp
1,128
12.2%
-0.3pp
Empty nesters and retirees (60 to 69)
2021 count
1,206
% of total
13.0%
Change from 2016
+0.4pp
1,206
13.0%
+0.4pp
Seniors (70 to 84)
2021 count
1,040
% of total
11.2%
Change from 2016
+2.5pp
1,040
11.2%
+2.5pp
Elderly aged (85 and over)
2021 count
152
% of total
1.6%
Change from 2016
+0.1pp
152
1.6%
+0.1pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
-60
-0.9pp
Primary schoolers (5 to 11)
+108
+0.9pp
Secondary schoolers (12 to 17)
+66
+0.5pp
Tertiary education and independence (18 to 24)
-38
-0.7pp
Young workforce (25 to 34)
-159
-2.1pp
Parents and homebuilders (35 to 49)
-17
-0.9pp
Older workers and pre-retirees (50 to 59)
+7
-0.3pp
Empty nesters and retirees (60 to 69)
+77
+0.4pp
Seniors (70 to 84)
+257
+2.5pp
Elderly aged (85 and over)
+18
+0.1pp
Data table
Service age groups for Montmorency. Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Banyule (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Banyule (C)% | Count | % | Banyule (C)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 578 | 6.2% | 5.6% | 638 | 7.1% | 6.4% | -60 | -0.9pp |
| Primary schoolers (5 to 11) | 916 | 9.9% | 8.6% | 808 | 9.0% | 8.5% | +108 | +0.9pp |
| Secondary schoolers (12 to 17) | 659 | 7.1% | 6.9% | 593 | 6.6% | 6.5% | +66 | +0.5pp |
| Tertiary education and independence (18 to 24) | 567 | 6.1% | 7.7% | 605 | 6.8% | 8.4% | -38 | -0.7pp |
| Young workforce (25 to 34) | 913 | 9.9% | 12.9% | 1,072 | 12.0% | 13.3% | -159 | -2.1pp |
| Parents and homebuilders (35 to 49) | 2,062 | 22.3% | 21.3% | 2,079 | 23.2% | 21.1% | -17 | -0.9pp |
| Older workers and pre-retirees (50 to 59) | 1,128 | 12.2% | 12.4% | 1,121 | 12.5% | 12.7% | +7 | -0.3pp |
| Empty nesters and retirees (60 to 69) | 1,206 | 13.0% | 11.0% | 1,129 | 12.6% | 11.0% | +77 | +0.4pp |
| Seniors (70 to 84) | 1,040 | 11.2% | 11.0% | 783 | 8.7% | 9.4% | +257 | +2.5pp |
| Elderly aged (85 and over) | 152 | 1.6% | 2.7% | 134 | 1.5% | 2.7% | +18 | +0.1pp |
| Total | 9,250 | 100.0% | 100.0% | 8,960 | 100.0% | 100.0% | +290 | 0.0pp |