Population
Five year age groups
About this topic
Five year age groups show the population in standard five-year cohorts from early childhood through older age. Because each band covers the same span of years, the topic gives a clear and comparable view of an area's age structure.
This topic is useful for identifying growth or decline in specific cohorts and for comparing age patterns across places and over time. For service planning, it is often read together with service age groups, household types, and dwelling types.
Interpretation notes
- Age is reported as at Census night, so the counts are a snapshot of the resident age structure at that point in time.
- Because each band covers the same five-year span, this topic is best for exact cohort comparison rather than service-planning life stages.
Related topics
Key insight
In 2021, 40 to 44 year olds was the largest age group among residents in Montmorency, accounting for 7.8% (721 people). This share was higher than Banyule (C) (7.1%). Since 2016, the biggest change was in 75 to 79 year olds, which increased by 154 people and 1.6 percentage points.
Section overview
Age structure - Five year age groups
Montmorency - Total persons (Usual residence)
This table summarises five year age groups for Montmorency in 2021 for persons, with comparison against Banyule (C) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Montmorency, with comparison markers for Banyule (C).
0 to 4
2021 count
578
% of total
6.2%
Change from 2016
-0.9pp
578
6.2%
-0.9pp
5 to 9
2021 count
654
% of total
7.1%
Change from 2016
+0.4pp
654
7.1%
+0.4pp
10 to 14
2021 count
622
% of total
6.7%
Change from 2016
+1.1pp
622
6.7%
+1.1pp
15 to 19
2021 count
468
% of total
5.1%
Change from 2016
-0.4pp
468
5.1%
-0.4pp
20 to 24
2021 count
398
% of total
4.3%
Change from 2016
-0.4pp
398
4.3%
-0.4pp
25 to 29
2021 count
408
% of total
4.4%
Change from 2016
-1.3pp
408
4.4%
-1.3pp
30 to 34
2021 count
505
% of total
5.5%
Change from 2016
-0.7pp
505
5.5%
-0.7pp
35 to 39
2021 count
664
% of total
7.2%
Change from 2016
-0.5pp
664
7.2%
-0.5pp
40 to 44
2021 count
721
% of total
7.8%
Change from 2016
0.0pp
721
7.8%
0.0pp
45 to 49
2021 count
677
% of total
7.3%
Change from 2016
-0.4pp
677
7.3%
-0.4pp
50 to 54
2021 count
620
% of total
6.7%
Change from 2016
+0.9pp
620
6.7%
+0.9pp
55 to 59
2021 count
508
% of total
5.5%
Change from 2016
-1.3pp
508
5.5%
-1.3pp
60 to 64
2021 count
611
% of total
6.6%
Change from 2016
+0.1pp
611
6.6%
+0.1pp
65 to 69
2021 count
595
% of total
6.4%
Change from 2016
+0.3pp
595
6.4%
+0.3pp
70 to 74
2021 count
472
% of total
5.1%
Change from 2016
+0.5pp
472
5.1%
+0.5pp
75 to 79
2021 count
379
% of total
4.1%
Change from 2016
+1.6pp
379
4.1%
+1.6pp
80 to 84
2021 count
189
% of total
2.0%
Change from 2016
+0.3pp
189
2.0%
+0.3pp
85 and over
2021 count
152
% of total
1.6%
Change from 2016
+0.1pp
152
1.6%
+0.1pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-60
-0.9pp
5 to 9
+55
+0.4pp
10 to 14
+122
+1.1pp
15 to 19
-21
-0.4pp
20 to 24
-20
-0.4pp
25 to 29
-105
-1.3pp
30 to 34
-54
-0.7pp
35 to 39
-29
-0.5pp
40 to 44
+24
0.0pp
45 to 49
-12
-0.4pp
50 to 54
+104
+0.9pp
55 to 59
-97
-1.3pp
60 to 64
+25
+0.1pp
65 to 69
+52
+0.3pp
70 to 74
+64
+0.5pp
75 to 79
+154
+1.6pp
80 to 84
+39
+0.3pp
85 and over
+18
+0.1pp
Data table
Five year age groups for Montmorency. Age structure - Five year 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 | |
| 0 to 4 | 578 | 6.2% | 5.6% | 638 | 7.1% | 6.4% | -60 | -0.9pp |
| 5 to 9 | 654 | 7.1% | 6.2% | 599 | 6.7% | 6.2% | +55 | +0.4pp |
| 10 to 14 | 622 | 6.7% | 6.0% | 500 | 5.6% | 5.5% | +122 | +1.1pp |
| 15 to 19 | 468 | 5.1% | 5.4% | 489 | 5.5% | 5.6% | -21 | -0.4pp |
| 20 to 24 | 398 | 4.3% | 5.5% | 418 | 4.7% | 6.1% | -20 | -0.4pp |
| 25 to 29 | 408 | 4.4% | 5.9% | 513 | 5.7% | 6.5% | -105 | -1.3pp |
| 30 to 34 | 505 | 5.5% | 7.0% | 559 | 6.2% | 6.9% | -54 | -0.7pp |
| 35 to 39 | 664 | 7.2% | 7.3% | 693 | 7.7% | 7.1% | -29 | -0.5pp |
| 40 to 44 | 721 | 7.8% | 7.1% | 697 | 7.8% | 7.2% | +24 | 0.0pp |
| 45 to 49 | 677 | 7.3% | 6.9% | 689 | 7.7% | 6.9% | -12 | -0.4pp |
| 50 to 54 | 620 | 6.7% | 6.5% | 516 | 5.8% | 6.4% | +104 | +0.9pp |
| 55 to 59 | 508 | 5.5% | 5.9% | 605 | 6.8% | 6.3% | -97 | -1.3pp |
| 60 to 64 | 611 | 6.6% | 5.8% | 586 | 6.5% | 5.6% | +25 | +0.1pp |
| 65 to 69 | 595 | 6.4% | 5.2% | 543 | 6.1% | 5.4% | +52 | +0.3pp |
| 70 to 74 | 472 | 5.1% | 4.9% | 408 | 4.6% | 4.1% | +64 | +0.5pp |
| 75 to 79 | 379 | 4.1% | 3.6% | 225 | 2.5% | 3.0% | +154 | +1.6pp |
| 80 to 84 | 189 | 2.0% | 2.5% | 150 | 1.7% | 2.3% | +39 | +0.3pp |
| 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 |