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, 55 to 59 year olds was the largest age group among residents in Greenfields, accounting for 6.7% (659 people). This share was similar to Mandurah (C) (6.6%). Since 2016, the biggest change was in 85 and over year olds, which increased by 151 people and 1.5 percentage points.
Section overview
Age structure - Five year age groups
Greenfields - Total persons (Usual residence)
This table summarises five year age groups for Greenfields in 2021 for persons, with comparison against Mandurah (C) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Greenfields, with comparison markers for Mandurah (C).
0 to 4
2021 count
506
% of total
5.1%
Change from 2016
-0.9pp
506
5.1%
-0.9pp
5 to 9
2021 count
590
% of total
6.0%
Change from 2016
-0.1pp
590
6.0%
-0.1pp
10 to 14
2021 count
601
% of total
6.1%
Change from 2016
+0.3pp
601
6.1%
+0.3pp
15 to 19
2021 count
514
% of total
5.2%
Change from 2016
-0.7pp
514
5.2%
-0.7pp
20 to 24
2021 count
540
% of total
5.5%
Change from 2016
-0.2pp
540
5.5%
-0.2pp
25 to 29
2021 count
475
% of total
4.8%
Change from 2016
-1.0pp
475
4.8%
-1.0pp
30 to 34
2021 count
534
% of total
5.4%
Change from 2016
-0.2pp
534
5.4%
-0.2pp
35 to 39
2021 count
515
% of total
5.2%
Change from 2016
+0.7pp
515
5.2%
+0.7pp
40 to 44
2021 count
443
% of total
4.5%
Change from 2016
-0.9pp
443
4.5%
-0.9pp
45 to 49
2021 count
508
% of total
5.1%
Change from 2016
-0.9pp
508
5.1%
-0.9pp
50 to 54
2021 count
600
% of total
6.1%
Change from 2016
-0.1pp
600
6.1%
-0.1pp
55 to 59
2021 count
659
% of total
6.7%
Change from 2016
+1.3pp
659
6.7%
+1.3pp
60 to 64
2021 count
585
% of total
5.9%
Change from 2016
+0.2pp
585
5.9%
+0.2pp
65 to 69
2021 count
595
% of total
6.0%
Change from 2016
+0.7pp
595
6.0%
+0.7pp
70 to 74
2021 count
600
% of total
6.1%
Change from 2016
+0.6pp
600
6.1%
+0.6pp
75 to 79
2021 count
550
% of total
5.6%
Change from 2016
-0.8pp
550
5.6%
-0.8pp
80 to 84
2021 count
550
% of total
5.6%
Change from 2016
+0.5pp
550
5.6%
+0.5pp
85 and over
2021 count
507
% of total
5.1%
Change from 2016
+1.5pp
507
5.1%
+1.5pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-82
-0.9pp
5 to 9
-14
-0.1pp
10 to 14
+30
+0.3pp
15 to 19
-72
-0.7pp
20 to 24
-17
-0.2pp
25 to 29
-97
-1.0pp
30 to 34
-20
-0.2pp
35 to 39
+70
+0.7pp
40 to 44
-92
-0.9pp
45 to 49
-79
-0.9pp
50 to 54
-10
-0.1pp
55 to 59
+124
+1.3pp
60 to 64
+23
+0.2pp
65 to 69
+76
+0.7pp
70 to 74
+62
+0.6pp
75 to 79
-80
-0.8pp
80 to 84
+50
+0.5pp
85 and over
+151
+1.5pp
Data table
Five year age groups for Greenfields. Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Mandurah (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Mandurah (C)% | Count | % | Mandurah (C)% | Count | pp | |
| 0 to 4 | 506 | 5.1% | 5.3% | 588 | 6.0% | 5.8% | -82 | -0.9pp |
| 5 to 9 | 590 | 6.0% | 5.8% | 604 | 6.1% | 6.3% | -14 | -0.1pp |
| 10 to 14 | 601 | 6.1% | 6.3% | 571 | 5.8% | 5.9% | +30 | +0.3pp |
| 15 to 19 | 514 | 5.2% | 5.5% | 586 | 5.9% | 6.0% | -72 | -0.7pp |
| 20 to 24 | 540 | 5.5% | 5.0% | 557 | 5.7% | 5.4% | -17 | -0.2pp |
| 25 to 29 | 475 | 4.8% | 4.8% | 572 | 5.8% | 5.2% | -97 | -1.0pp |
| 30 to 34 | 534 | 5.4% | 5.4% | 554 | 5.6% | 5.7% | -20 | -0.2pp |
| 35 to 39 | 515 | 5.2% | 5.8% | 445 | 4.5% | 5.4% | +70 | +0.7pp |
| 40 to 44 | 443 | 4.5% | 5.3% | 535 | 5.4% | 6.1% | -92 | -0.9pp |
| 45 to 49 | 508 | 5.1% | 5.9% | 587 | 6.0% | 6.4% | -79 | -0.9pp |
| 50 to 54 | 600 | 6.1% | 6.2% | 610 | 6.2% | 6.5% | -10 | -0.1pp |
| 55 to 59 | 659 | 6.7% | 6.6% | 535 | 5.4% | 6.3% | +124 | +1.3pp |
| 60 to 64 | 585 | 5.9% | 6.7% | 562 | 5.7% | 6.4% | +23 | +0.2pp |
| 65 to 69 | 595 | 6.0% | 6.9% | 519 | 5.3% | 6.8% | +76 | +0.7pp |
| 70 to 74 | 600 | 6.1% | 6.9% | 538 | 5.5% | 5.7% | +62 | +0.6pp |
| 75 to 79 | 550 | 5.6% | 5.1% | 630 | 6.4% | 4.6% | -80 | -0.8pp |
| 80 to 84 | 550 | 5.6% | 3.6% | 500 | 5.1% | 3.0% | +50 | +0.5pp |
| 85 and over | 507 | 5.1% | 3.0% | 356 | 3.6% | 2.6% | +151 | +1.5pp |
| Total | 9,869 | 100.0% | 100.0% | 9,855 | 100.0% | 100.0% | +14 | 0.0pp |