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 Woodcroft (SA), accounting for 7.3% (827 people). This share was higher than Onkaparinga (C) (6.5%). Since 2016, the biggest change was in 55 to 59 year olds, which increased by 827 people and 7.3 percentage points.
Section overview
Age structure - Five year age groups
Woodcroft (SA) - Total persons (Usual residence)
This table summarises five year age groups for Woodcroft (SA) in 2021 for persons, with comparison against Onkaparinga (C) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Woodcroft (SA), with comparison markers for Onkaparinga (C).
0 to 4
2021 count
587
% of total
5.2%
Change from 2016
+5.2pp
587
5.2%
+5.2pp
5 to 9
2021 count
650
% of total
5.7%
Change from 2016
+5.7pp
650
5.7%
+5.7pp
10 to 14
2021 count
741
% of total
6.5%
Change from 2016
+6.5pp
741
6.5%
+6.5pp
15 to 19
2021 count
761
% of total
6.7%
Change from 2016
-3.6pp
761
6.7%
-3.6pp
20 to 24
2021 count
712
% of total
6.3%
Change from 2016
+6.3pp
712
6.3%
+6.3pp
25 to 29
2021 count
619
% of total
5.5%
Change from 2016
+5.5pp
619
5.5%
+5.5pp
30 to 34
2021 count
643
% of total
5.7%
Change from 2016
-4.6pp
643
5.7%
-4.6pp
35 to 39
2021 count
712
% of total
6.3%
Change from 2016
+6.3pp
712
6.3%
+6.3pp
40 to 44
2021 count
646
% of total
5.7%
Change from 2016
-4.6pp
646
5.7%
-4.6pp
45 to 49
2021 count
727
% of total
6.4%
Change from 2016
+6.4pp
727
6.4%
+6.4pp
50 to 54
2021 count
808
% of total
7.1%
Change from 2016
+7.1pp
808
7.1%
+7.1pp
55 to 59
2021 count
827
% of total
7.3%
Change from 2016
+7.3pp
827
7.3%
+7.3pp
60 to 64
2021 count
692
% of total
6.1%
Change from 2016
+6.1pp
692
6.1%
+6.1pp
65 to 69
2021 count
592
% of total
5.2%
Change from 2016
+5.2pp
592
5.2%
+5.2pp
70 to 74
2021 count
565
% of total
5.0%
Change from 2016
+5.0pp
565
5.0%
+5.0pp
75 to 79
2021 count
453
% of total
4.0%
Change from 2016
+4.0pp
453
4.0%
+4.0pp
80 to 84
2021 count
301
% of total
2.7%
Change from 2016
+2.7pp
301
2.7%
+2.7pp
85 and over
2021 count
289
% of total
2.6%
Change from 2016
+2.6pp
289
2.6%
+2.6pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
+587
+5.2pp
5 to 9
+650
+5.7pp
10 to 14
+741
+6.5pp
15 to 19
+758
-3.6pp
20 to 24
+712
+6.3pp
25 to 29
+619
+5.5pp
30 to 34
+640
-4.6pp
35 to 39
+712
+6.3pp
40 to 44
+643
-4.6pp
45 to 49
+727
+6.4pp
50 to 54
+808
+7.1pp
55 to 59
+827
+7.3pp
60 to 64
+692
+6.1pp
65 to 69
+592
+5.2pp
70 to 74
+565
+5.0pp
75 to 79
+453
+4.0pp
80 to 84
+301
+2.7pp
85 and over
+289
+2.6pp
Data table
Five year age groups for Woodcroft (SA). Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Onkaparinga (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Onkaparinga (C)% | Count | % | Onkaparinga (C)% | Count | pp | |
| 0 to 4 | 587 | 5.2% | 5.4% | 0 | 0.0% | 6.2% | +587 | +5.2pp |
| 5 to 9 | 650 | 5.7% | 6.2% | 0 | 0.0% | 6.4% | +650 | +5.7pp |
| 10 to 14 | 741 | 6.5% | 6.2% | 0 | 0.0% | 6.1% | +741 | +6.5pp |
| 15 to 19 | 761 | 6.7% | 5.8% | 3 | 10.3% | 6.2% | +758 | -3.6pp |
| 20 to 24 | 712 | 6.3% | 5.6% | 0 | 0.0% | 6.0% | +712 | +6.3pp |
| 25 to 29 | 619 | 5.5% | 6.0% | 0 | 0.0% | 5.9% | +619 | +5.5pp |
| 30 to 34 | 643 | 5.7% | 6.3% | 3 | 10.3% | 6.5% | +640 | -4.6pp |
| 35 to 39 | 712 | 6.3% | 6.7% | 0 | 0.0% | 6.3% | +712 | +6.3pp |
| 40 to 44 | 646 | 5.7% | 6.1% | 3 | 10.3% | 6.6% | +643 | -4.6pp |
| 45 to 49 | 727 | 6.4% | 6.4% | 0 | 0.0% | 6.9% | +727 | +6.4pp |
| 50 to 54 | 808 | 7.1% | 6.6% | 0 | 0.0% | 6.7% | +808 | +7.1pp |
| 55 to 59 | 827 | 7.3% | 6.5% | 0 | 0.0% | 6.6% | +827 | +7.3pp |
| 60 to 64 | 692 | 6.1% | 6.3% | 0 | 0.0% | 6.3% | +692 | +6.1pp |
| 65 to 69 | 592 | 5.2% | 5.9% | 0 | 0.0% | 6.1% | +592 | +5.2pp |
| 70 to 74 | 565 | 5.0% | 5.7% | 0 | 0.0% | 4.3% | +565 | +5.0pp |
| 75 to 79 | 453 | 4.0% | 3.8% | 0 | 0.0% | 2.8% | +453 | +4.0pp |
| 80 to 84 | 301 | 2.7% | 2.3% | 0 | 0.0% | 2.0% | +301 | +2.7pp |
| 85 and over | 289 | 2.6% | 2.2% | 0 | 0.0% | 2.1% | +289 | +2.6pp |
| Total | 11,326 | 100.0% | 100.0% | 29 | 100.0% | 100.0% | +11,297 | 0.0pp |