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, 65 to 69 year olds was the largest age group among residents in Happy Valley (SA), accounting for 7% (798 people). This share was higher than Onkaparinga (C) (5.9%). Since 2016, the biggest change was in 70 to 74 year olds, which increased by 322 people and 2.8 percentage points.
Section overview
Age structure - Five year age groups
Happy Valley (SA) - Total persons (Usual residence)
This table summarises five year age groups for Happy Valley (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 Happy Valley (SA), with comparison markers for Onkaparinga (C).
0 to 4
2021 count
632
% of total
5.5%
Change from 2016
-0.1pp
632
5.5%
-0.1pp
5 to 9
2021 count
625
% of total
5.5%
Change from 2016
-1.1pp
625
5.5%
-1.1pp
10 to 14
2021 count
680
% of total
6.0%
Change from 2016
+0.1pp
680
6.0%
+0.1pp
15 to 19
2021 count
672
% of total
5.9%
Change from 2016
+0.3pp
672
5.9%
+0.3pp
20 to 24
2021 count
549
% of total
4.8%
Change from 2016
-0.6pp
549
4.8%
-0.6pp
25 to 29
2021 count
633
% of total
5.5%
Change from 2016
-0.3pp
633
5.5%
-0.3pp
30 to 34
2021 count
725
% of total
6.3%
Change from 2016
-0.1pp
725
6.3%
-0.1pp
35 to 39
2021 count
786
% of total
6.9%
Change from 2016
+0.1pp
786
6.9%
+0.1pp
40 to 44
2021 count
734
% of total
6.4%
Change from 2016
0.0pp
734
6.4%
0.0pp
45 to 49
2021 count
702
% of total
6.1%
Change from 2016
-0.3pp
702
6.1%
-0.3pp
50 to 54
2021 count
689
% of total
6.0%
Change from 2016
-0.2pp
689
6.0%
-0.2pp
55 to 59
2021 count
662
% of total
5.8%
Change from 2016
-1.1pp
662
5.8%
-1.1pp
60 to 64
2021 count
765
% of total
6.7%
Change from 2016
-0.6pp
765
6.7%
-0.6pp
65 to 69
2021 count
798
% of total
7.0%
Change from 2016
+0.1pp
798
7.0%
+0.1pp
70 to 74
2021 count
740
% of total
6.5%
Change from 2016
+2.8pp
740
6.5%
+2.8pp
75 to 79
2021 count
414
% of total
3.6%
Change from 2016
+0.7pp
414
3.6%
+0.7pp
80 to 84
2021 count
302
% of total
2.6%
Change from 2016
0.0pp
302
2.6%
0.0pp
85 and over
2021 count
314
% of total
2.7%
Change from 2016
+0.3pp
314
2.7%
+0.3pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
+3
-0.1pp
5 to 9
-112
-1.1pp
10 to 14
+16
+0.1pp
15 to 19
+45
+0.3pp
20 to 24
-61
-0.6pp
25 to 29
-22
-0.3pp
30 to 34
+9
-0.1pp
35 to 39
+23
+0.1pp
40 to 44
+17
0.0pp
45 to 49
-19
-0.3pp
50 to 54
-2
-0.2pp
55 to 59
-109
-1.1pp
60 to 64
-54
-0.6pp
65 to 69
+29
+0.1pp
70 to 74
+322
+2.8pp
75 to 79
+86
+0.7pp
80 to 84
+6
0.0pp
85 and over
+44
+0.3pp
Data table
Five year age groups for Happy Valley (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 | 632 | 5.5% | 5.4% | 629 | 5.6% | 6.2% | +3 | -0.1pp |
| 5 to 9 | 625 | 5.5% | 6.2% | 737 | 6.6% | 6.4% | -112 | -1.1pp |
| 10 to 14 | 680 | 6.0% | 6.2% | 664 | 5.9% | 6.1% | +16 | +0.1pp |
| 15 to 19 | 672 | 5.9% | 5.8% | 627 | 5.6% | 6.2% | +45 | +0.3pp |
| 20 to 24 | 549 | 4.8% | 5.6% | 610 | 5.4% | 6.0% | -61 | -0.6pp |
| 25 to 29 | 633 | 5.5% | 6.0% | 655 | 5.8% | 5.9% | -22 | -0.3pp |
| 30 to 34 | 725 | 6.3% | 6.3% | 716 | 6.4% | 6.5% | +9 | -0.1pp |
| 35 to 39 | 786 | 6.9% | 6.7% | 763 | 6.8% | 6.3% | +23 | +0.1pp |
| 40 to 44 | 734 | 6.4% | 6.1% | 717 | 6.4% | 6.6% | +17 | 0.0pp |
| 45 to 49 | 702 | 6.1% | 6.4% | 721 | 6.4% | 6.9% | -19 | -0.3pp |
| 50 to 54 | 689 | 6.0% | 6.6% | 691 | 6.2% | 6.7% | -2 | -0.2pp |
| 55 to 59 | 662 | 5.8% | 6.5% | 771 | 6.9% | 6.6% | -109 | -1.1pp |
| 60 to 64 | 765 | 6.7% | 6.3% | 819 | 7.3% | 6.3% | -54 | -0.6pp |
| 65 to 69 | 798 | 7.0% | 5.9% | 769 | 6.9% | 6.1% | +29 | +0.1pp |
| 70 to 74 | 740 | 6.5% | 5.7% | 418 | 3.7% | 4.3% | +322 | +2.8pp |
| 75 to 79 | 414 | 3.6% | 3.8% | 328 | 2.9% | 2.8% | +86 | +0.7pp |
| 80 to 84 | 302 | 2.6% | 2.3% | 296 | 2.6% | 2.0% | +6 | 0.0pp |
| 85 and over | 314 | 2.7% | 2.2% | 270 | 2.4% | 2.1% | +44 | +0.3pp |
| Total | 11,420 | 100.0% | 100.0% | 11,219 | 100.0% | 100.0% | +201 | 0.0pp |