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, 25 to 29 year olds was the largest age group among residents in North Perth, accounting for 9% (870 people). This share was lower than Vincent (C) (11.2%). Since 2016, the biggest change was in 40 to 44 year olds, which increased by 135 people and 0.8 percentage points.
Section overview
Age structure - Five year age groups
North Perth - Total persons (Usual residence)
This table summarises five year age groups for North Perth in 2021 for persons, with comparison against Vincent (C) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for North Perth, with comparison markers for Vincent (C).
0 to 4
2021 count
514
% of total
5.3%
Change from 2016
-0.2pp
514
5.3%
-0.2pp
5 to 9
2021 count
487
% of total
5.1%
Change from 2016
-0.7pp
487
5.1%
-0.7pp
10 to 14
2021 count
502
% of total
5.2%
Change from 2016
+0.8pp
502
5.2%
+0.8pp
15 to 19
2021 count
380
% of total
3.9%
Change from 2016
-0.1pp
380
3.9%
-0.1pp
20 to 24
2021 count
620
% of total
6.4%
Change from 2016
+0.1pp
620
6.4%
+0.1pp
25 to 29
2021 count
870
% of total
9.0%
Change from 2016
-0.8pp
870
9.0%
-0.8pp
30 to 34
2021 count
857
% of total
8.9%
Change from 2016
-0.4pp
857
8.9%
-0.4pp
35 to 39
2021 count
827
% of total
8.6%
Change from 2016
+0.1pp
827
8.6%
+0.1pp
40 to 44
2021 count
742
% of total
7.7%
Change from 2016
+0.8pp
742
7.7%
+0.8pp
45 to 49
2021 count
643
% of total
6.7%
Change from 2016
-0.8pp
643
6.7%
-0.8pp
50 to 54
2021 count
623
% of total
6.5%
Change from 2016
-0.5pp
623
6.5%
-0.5pp
55 to 59
2021 count
639
% of total
6.6%
Change from 2016
+0.5pp
639
6.6%
+0.5pp
60 to 64
2021 count
520
% of total
5.4%
Change from 2016
+0.6pp
520
5.4%
+0.6pp
65 to 69
2021 count
410
% of total
4.3%
Change from 2016
+0.6pp
410
4.3%
+0.6pp
70 to 74
2021 count
325
% of total
3.4%
Change from 2016
+1.0pp
325
3.4%
+1.0pp
75 to 79
2021 count
208
% of total
2.2%
Change from 2016
-0.4pp
208
2.2%
-0.4pp
80 to 84
2021 count
194
% of total
2.0%
Change from 2016
-0.2pp
194
2.0%
-0.2pp
85 and over
2021 count
252
% of total
2.6%
Change from 2016
-0.3pp
252
2.6%
-0.3pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
+33
-0.2pp
5 to 9
-24
-0.7pp
10 to 14
+117
+0.8pp
15 to 19
+27
-0.1pp
20 to 24
+72
+0.1pp
25 to 29
+13
-0.8pp
30 to 34
+44
-0.4pp
35 to 39
+88
+0.1pp
40 to 44
+135
+0.8pp
45 to 49
-11
-0.8pp
50 to 54
+11
-0.5pp
55 to 59
+105
+0.5pp
60 to 64
+103
+0.6pp
65 to 69
+84
+0.6pp
70 to 74
+112
+1.0pp
75 to 79
-23
-0.4pp
80 to 84
+1
-0.2pp
85 and over
-3
-0.3pp
Data table
Five year age groups for North Perth. Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Vincent (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Vincent (C)% | Count | % | Vincent (C)% | Count | pp | |
| 0 to 4 | 514 | 5.3% | 5.2% | 481 | 5.5% | 5.5% | +33 | -0.2pp |
| 5 to 9 | 487 | 5.1% | 4.7% | 511 | 5.8% | 5.0% | -24 | -0.7pp |
| 10 to 14 | 502 | 5.2% | 4.4% | 385 | 4.4% | 3.6% | +117 | +0.8pp |
| 15 to 19 | 380 | 3.9% | 3.5% | 353 | 4.0% | 3.6% | +27 | -0.1pp |
| 20 to 24 | 620 | 6.4% | 7.0% | 548 | 6.3% | 7.4% | +72 | +0.1pp |
| 25 to 29 | 870 | 9.0% | 11.2% | 857 | 9.8% | 13.0% | +13 | -0.8pp |
| 30 to 34 | 857 | 8.9% | 11.5% | 813 | 9.3% | 12.6% | +44 | -0.4pp |
| 35 to 39 | 827 | 8.6% | 9.8% | 739 | 8.5% | 9.0% | +88 | +0.1pp |
| 40 to 44 | 742 | 7.7% | 7.5% | 607 | 6.9% | 7.2% | +135 | +0.8pp |
| 45 to 49 | 643 | 6.7% | 6.5% | 654 | 7.5% | 6.7% | -11 | -0.8pp |
| 50 to 54 | 623 | 6.5% | 6.3% | 612 | 7.0% | 5.9% | +11 | -0.5pp |
| 55 to 59 | 639 | 6.6% | 5.7% | 534 | 6.1% | 5.4% | +105 | +0.5pp |
| 60 to 64 | 520 | 5.4% | 4.9% | 417 | 4.8% | 4.3% | +103 | +0.6pp |
| 65 to 69 | 410 | 4.3% | 3.8% | 326 | 3.7% | 3.5% | +84 | +0.6pp |
| 70 to 74 | 325 | 3.4% | 3.0% | 213 | 2.4% | 2.1% | +112 | +1.0pp |
| 75 to 79 | 208 | 2.2% | 1.8% | 231 | 2.6% | 1.8% | -23 | -0.4pp |
| 80 to 84 | 194 | 2.0% | 1.4% | 193 | 2.2% | 1.4% | +1 | -0.2pp |
| 85 and over | 252 | 2.6% | 1.8% | 255 | 2.9% | 2.0% | -3 | -0.3pp |
| Total | 9,623 | 100.0% | 100.0% | 8,744 | 100.0% | 100.0% | +879 | 0.0pp |