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, 50 to 54 year olds was the largest age group among residents in Niddrie, accounting for 8% (471 people). This share was higher than Moonee Valley (C) (6.9%). Since 2016, the biggest change was in 70 to 74 year olds, which increased by 129 people and 2 percentage points.
Section overview
Age structure - Five year age groups
Niddrie - Total persons (Usual residence)
This table summarises five year age groups for Niddrie in 2021 for persons, with comparison against Moonee Valley (C) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Niddrie, with comparison markers for Moonee Valley (C).
0 to 4
2021 count
317
% of total
5.4%
Change from 2016
-0.7pp
317
5.4%
-0.7pp
5 to 9
2021 count
348
% of total
5.9%
Change from 2016
-0.8pp
348
5.9%
-0.8pp
10 to 14
2021 count
395
% of total
6.7%
Change from 2016
+0.6pp
395
6.7%
+0.6pp
15 to 19
2021 count
362
% of total
6.1%
Change from 2016
+0.3pp
362
6.1%
+0.3pp
20 to 24
2021 count
365
% of total
6.2%
Change from 2016
+0.6pp
365
6.2%
+0.6pp
25 to 29
2021 count
355
% of total
6.0%
Change from 2016
+0.1pp
355
6.0%
+0.1pp
30 to 34
2021 count
353
% of total
6.0%
Change from 2016
-0.8pp
353
6.0%
-0.8pp
35 to 39
2021 count
411
% of total
7.0%
Change from 2016
-0.6pp
411
7.0%
-0.6pp
40 to 44
2021 count
444
% of total
7.5%
Change from 2016
-0.4pp
444
7.5%
-0.4pp
45 to 49
2021 count
462
% of total
7.8%
Change from 2016
-0.9pp
462
7.8%
-0.9pp
50 to 54
2021 count
471
% of total
8.0%
Change from 2016
+0.6pp
471
8.0%
+0.6pp
55 to 59
2021 count
401
% of total
6.8%
Change from 2016
+0.8pp
401
6.8%
+0.8pp
60 to 64
2021 count
324
% of total
5.5%
Change from 2016
+1.2pp
324
5.5%
+1.2pp
65 to 69
2021 count
228
% of total
3.9%
Change from 2016
-0.4pp
228
3.9%
-0.4pp
70 to 74
2021 count
256
% of total
4.3%
Change from 2016
+2.0pp
256
4.3%
+2.0pp
75 to 79
2021 count
124
% of total
2.1%
Change from 2016
-0.7pp
124
2.1%
-0.7pp
80 to 84
2021 count
135
% of total
2.3%
Change from 2016
-0.2pp
135
2.3%
-0.2pp
85 and over
2021 count
173
% of total
2.9%
Change from 2016
-0.4pp
173
2.9%
-0.4pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-16
-0.7pp
5 to 9
-21
-0.8pp
10 to 14
+61
+0.6pp
15 to 19
+42
+0.3pp
20 to 24
+58
+0.6pp
25 to 29
+31
+0.1pp
30 to 34
-22
-0.8pp
35 to 39
-8
-0.6pp
40 to 44
+12
-0.4pp
45 to 49
-14
-0.9pp
50 to 54
+63
+0.6pp
55 to 59
+72
+0.8pp
60 to 64
+91
+1.2pp
65 to 69
-5
-0.4pp
70 to 74
+129
+2.0pp
75 to 79
-28
-0.7pp
80 to 84
-1
-0.2pp
85 and over
-10
-0.4pp
Data table
Five year age groups for Niddrie. Age structure - Five year 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 | |
| 0 to 4 | 317 | 5.4% | 5.0% | 333 | 6.1% | 5.7% | -16 | -0.7pp |
| 5 to 9 | 348 | 5.9% | 5.5% | 369 | 6.7% | 5.7% | -21 | -0.8pp |
| 10 to 14 | 395 | 6.7% | 5.5% | 334 | 6.1% | 5.4% | +61 | +0.6pp |
| 15 to 19 | 362 | 6.1% | 5.3% | 320 | 5.8% | 5.4% | +42 | +0.3pp |
| 20 to 24 | 365 | 6.2% | 6.3% | 307 | 5.6% | 6.8% | +58 | +0.6pp |
| 25 to 29 | 355 | 6.0% | 7.4% | 324 | 5.9% | 7.9% | +31 | +0.1pp |
| 30 to 34 | 353 | 6.0% | 7.7% | 375 | 6.8% | 8.1% | -22 | -0.8pp |
| 35 to 39 | 411 | 7.0% | 7.5% | 419 | 7.6% | 7.1% | -8 | -0.6pp |
| 40 to 44 | 444 | 7.5% | 6.9% | 432 | 7.9% | 7.2% | +12 | -0.4pp |
| 45 to 49 | 462 | 7.8% | 6.9% | 476 | 8.7% | 7.3% | -14 | -0.9pp |
| 50 to 54 | 471 | 8.0% | 6.9% | 408 | 7.4% | 6.3% | +63 | +0.6pp |
| 55 to 59 | 401 | 6.8% | 6.0% | 329 | 6.0% | 5.9% | +72 | +0.8pp |
| 60 to 64 | 324 | 5.5% | 5.5% | 233 | 4.3% | 5.1% | +91 | +1.2pp |
| 65 to 69 | 228 | 3.9% | 4.7% | 233 | 4.3% | 4.5% | -5 | -0.4pp |
| 70 to 74 | 256 | 4.3% | 4.2% | 127 | 2.3% | 3.5% | +129 | +2.0pp |
| 75 to 79 | 124 | 2.1% | 3.2% | 152 | 2.8% | 3.1% | -28 | -0.7pp |
| 80 to 84 | 135 | 2.3% | 2.5% | 136 | 2.5% | 2.4% | -1 | -0.2pp |
| 85 and over | 173 | 2.9% | 2.7% | 183 | 3.3% | 2.5% | -10 | -0.4pp |
| Total | 5,901 | 100.0% | 100.0% | 5,479 | 100.0% | 100.0% | +422 | 0.0pp |