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, 30 to 34 year olds was the largest age group among residents in Blakeview, accounting for 9.2% (830 people). This share was higher than Playford (C) (7.7%). Since 2016, the biggest change was in 35 to 39 year olds, which increased by 260 people and 1.6 percentage points.
Section overview
Age structure - Five year age groups
Blakeview - Total persons (Usual residence)
This table summarises five year age groups for Blakeview in 2021 for persons, with comparison against Playford (C) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Blakeview, with comparison markers for Playford (C).
0 to 4
2021 count
753
% of total
8.4%
Change from 2016
-1.0pp
753
8.4%
-1.0pp
5 to 9
2021 count
795
% of total
8.9%
Change from 2016
-0.3pp
795
8.9%
-0.3pp
10 to 14
2021 count
715
% of total
8.0%
Change from 2016
+1.6pp
715
8.0%
+1.6pp
15 to 19
2021 count
516
% of total
5.7%
Change from 2016
-1.1pp
516
5.7%
-1.1pp
20 to 24
2021 count
604
% of total
6.7%
Change from 2016
-1.7pp
604
6.7%
-1.7pp
25 to 29
2021 count
810
% of total
9.0%
Change from 2016
-1.5pp
810
9.0%
-1.5pp
30 to 34
2021 count
830
% of total
9.2%
Change from 2016
+0.5pp
830
9.2%
+0.5pp
35 to 39
2021 count
750
% of total
8.4%
Change from 2016
+1.6pp
750
8.4%
+1.6pp
40 to 44
2021 count
554
% of total
6.2%
Change from 2016
+0.2pp
554
6.2%
+0.2pp
45 to 49
2021 count
506
% of total
5.6%
Change from 2016
-0.7pp
506
5.6%
-0.7pp
50 to 54
2021 count
482
% of total
5.4%
Change from 2016
-0.6pp
482
5.4%
-0.6pp
55 to 59
2021 count
473
% of total
5.3%
Change from 2016
+0.3pp
473
5.3%
+0.3pp
60 to 64
2021 count
398
% of total
4.4%
Change from 2016
+0.9pp
398
4.4%
+0.9pp
65 to 69
2021 count
272
% of total
3.0%
Change from 2016
+0.5pp
272
3.0%
+0.5pp
70 to 74
2021 count
222
% of total
2.5%
Change from 2016
+0.7pp
222
2.5%
+0.7pp
75 to 79
2021 count
146
% of total
1.6%
Change from 2016
+0.5pp
146
1.6%
+0.5pp
80 to 84
2021 count
96
% of total
1.1%
Change from 2016
+0.3pp
96
1.1%
+0.3pp
85 and over
2021 count
75
% of total
0.8%
Change from 2016
+0.3pp
75
0.8%
+0.3pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
+73
-1.0pp
5 to 9
+129
-0.3pp
10 to 14
+250
+1.6pp
15 to 19
+26
-1.1pp
20 to 24
-2
-1.7pp
25 to 29
+53
-1.5pp
30 to 34
+204
+0.5pp
35 to 39
+260
+1.6pp
40 to 44
+120
+0.2pp
45 to 49
+49
-0.7pp
50 to 54
+47
-0.6pp
55 to 59
+110
+0.3pp
60 to 64
+143
+0.9pp
65 to 69
+93
+0.5pp
70 to 74
+93
+0.7pp
75 to 79
+67
+0.5pp
80 to 84
+40
+0.3pp
85 and over
+38
+0.3pp
Data table
Five year age groups for Blakeview. Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Playford (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Playford (C)% | Count | % | Playford (C)% | Count | pp | |
| 0 to 4 | 753 | 8.4% | 7.5% | 680 | 9.4% | 8.6% | +73 | -1.0pp |
| 5 to 9 | 795 | 8.9% | 8.0% | 666 | 9.2% | 7.9% | +129 | -0.3pp |
| 10 to 14 | 715 | 8.0% | 7.4% | 465 | 6.4% | 6.6% | +250 | +1.6pp |
| 15 to 19 | 516 | 5.7% | 6.2% | 490 | 6.8% | 6.7% | +26 | -1.1pp |
| 20 to 24 | 604 | 6.7% | 7.0% | 606 | 8.4% | 7.7% | -2 | -1.7pp |
| 25 to 29 | 810 | 9.0% | 8.2% | 757 | 10.5% | 7.9% | +53 | -1.5pp |
| 30 to 34 | 830 | 9.2% | 7.7% | 626 | 8.7% | 7.4% | +204 | +0.5pp |
| 35 to 39 | 750 | 8.4% | 7.1% | 490 | 6.8% | 6.1% | +260 | +1.6pp |
| 40 to 44 | 554 | 6.2% | 5.7% | 434 | 6.0% | 5.9% | +120 | +0.2pp |
| 45 to 49 | 506 | 5.6% | 5.7% | 457 | 6.3% | 6.2% | +49 | -0.7pp |
| 50 to 54 | 482 | 5.4% | 5.7% | 435 | 6.0% | 6.5% | +47 | -0.6pp |
| 55 to 59 | 473 | 5.3% | 5.8% | 363 | 5.0% | 5.8% | +110 | +0.3pp |
| 60 to 64 | 398 | 4.4% | 5.1% | 255 | 3.5% | 4.5% | +143 | +0.9pp |
| 65 to 69 | 272 | 3.0% | 4.0% | 179 | 2.5% | 3.9% | +93 | +0.5pp |
| 70 to 74 | 222 | 2.5% | 3.3% | 129 | 1.8% | 2.8% | +93 | +0.7pp |
| 75 to 79 | 146 | 1.6% | 2.2% | 79 | 1.1% | 2.3% | +67 | +0.5pp |
| 80 to 84 | 96 | 1.1% | 1.7% | 56 | 0.8% | 1.7% | +40 | +0.3pp |
| 85 and over | 75 | 0.8% | 1.6% | 37 | 0.5% | 1.5% | +38 | +0.3pp |
| Total | 8,979 | 100.0% | 100.0% | 7,229 | 100.0% | 100.0% | +1,750 | 0.0pp |