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 Port Augusta (C), accounting for 7.7% (1,071 people). This share was higher than Regional SA (5.1%). Since 2016, the biggest change was in 35 to 39 year olds, which increased by 143 people and 1 percentage point.
Section overview
Age structure - Five year age groups
Port Augusta (C) - Total persons (Usual residence)
This table summarises five year age groups for Port Augusta (C) in 2021 for persons, with comparison against Regional SA and change since 2016.
Chart view
Age structure - Five year age groups snapshot
2021 distribution by category for Port Augusta (C), with comparison markers for Regional SA.
0 to 4
2021 count
798
% of total
5.8%
Change from 2016
-0.6pp
798
5.8%
-0.6pp
5 to 9
2021 count
873
% of total
6.3%
Change from 2016
-0.3pp
873
6.3%
-0.3pp
10 to 14
2021 count
873
% of total
6.3%
Change from 2016
+0.3pp
873
6.3%
+0.3pp
15 to 19
2021 count
776
% of total
5.6%
Change from 2016
+0.2pp
776
5.6%
+0.2pp
20 to 24
2021 count
763
% of total
5.5%
Change from 2016
-1.0pp
763
5.5%
-1.0pp
25 to 29
2021 count
1,071
% of total
7.7%
Change from 2016
+0.5pp
1,071
7.7%
+0.5pp
30 to 34
2021 count
1,030
% of total
7.4%
Change from 2016
+0.9pp
1,030
7.4%
+0.9pp
35 to 39
2021 count
902
% of total
6.5%
Change from 2016
+1.0pp
902
6.5%
+1.0pp
40 to 44
2021 count
744
% of total
5.4%
Change from 2016
-0.6pp
744
5.4%
-0.6pp
45 to 49
2021 count
810
% of total
5.9%
Change from 2016
-0.8pp
810
5.9%
-0.8pp
50 to 54
2021 count
878
% of total
6.3%
Change from 2016
-0.9pp
878
6.3%
-0.9pp
55 to 59
2021 count
953
% of total
6.9%
Change from 2016
-0.3pp
953
6.9%
-0.3pp
60 to 64
2021 count
906
% of total
6.6%
Change from 2016
+0.4pp
906
6.6%
+0.4pp
65 to 69
2021 count
705
% of total
5.1%
Change from 2016
-0.6pp
705
5.1%
-0.6pp
70 to 74
2021 count
699
% of total
5.1%
Change from 2016
+0.7pp
699
5.1%
+0.7pp
75 to 79
2021 count
497
% of total
3.6%
Change from 2016
+0.8pp
497
3.6%
+0.8pp
80 to 84
2021 count
299
% of total
2.2%
Change from 2016
+0.3pp
299
2.2%
+0.3pp
85 and over
2021 count
246
% of total
1.8%
Change from 2016
+0.1pp
246
1.8%
+0.1pp
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-80
-0.6pp
5 to 9
-40
-0.3pp
10 to 14
+40
+0.3pp
15 to 19
+34
+0.2pp
20 to 24
-128
-1.0pp
25 to 29
+71
+0.5pp
30 to 34
+128
+0.9pp
35 to 39
+143
+1.0pp
40 to 44
-90
-0.6pp
45 to 49
-115
-0.8pp
50 to 54
-118
-0.9pp
55 to 59
-38
-0.3pp
60 to 64
+56
+0.4pp
65 to 69
-87
-0.6pp
70 to 74
+95
+0.7pp
75 to 79
+108
+0.8pp
80 to 84
+42
+0.3pp
85 and over
+9
+0.1pp
Data table
Five year age groups for Port Augusta (C). Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Regional SA.
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Regional SA% | Count | % | Regional SA% | Count | pp | |
| 0 to 4 | 798 | 5.8% | 4.9% | 878 | 6.4% | 5.5% | -80 | -0.6pp |
| 5 to 9 | 873 | 6.3% | 5.7% | 913 | 6.6% | 6.1% | -40 | -0.3pp |
| 10 to 14 | 873 | 6.3% | 6.1% | 833 | 6.0% | 6.0% | +40 | +0.3pp |
| 15 to 19 | 776 | 5.6% | 5.3% | 742 | 5.4% | 5.6% | +34 | +0.2pp |
| 20 to 24 | 763 | 5.5% | 4.6% | 891 | 6.5% | 4.8% | -128 | -1.0pp |
| 25 to 29 | 1,071 | 7.7% | 5.1% | 1,000 | 7.2% | 5.1% | +71 | +0.5pp |
| 30 to 34 | 1,030 | 7.4% | 5.4% | 902 | 6.5% | 5.3% | +128 | +0.9pp |
| 35 to 39 | 902 | 6.5% | 5.4% | 759 | 5.5% | 5.2% | +143 | +1.0pp |
| 40 to 44 | 744 | 5.4% | 5.2% | 834 | 6.0% | 5.9% | -90 | -0.6pp |
| 45 to 49 | 810 | 5.9% | 5.8% | 925 | 6.7% | 6.7% | -115 | -0.8pp |
| 50 to 54 | 878 | 6.3% | 6.7% | 996 | 7.2% | 7.1% | -118 | -0.9pp |
| 55 to 59 | 953 | 6.9% | 7.2% | 991 | 7.2% | 7.5% | -38 | -0.3pp |
| 60 to 64 | 906 | 6.6% | 7.7% | 850 | 6.2% | 7.3% | +56 | +0.4pp |
| 65 to 69 | 705 | 5.1% | 7.4% | 792 | 5.7% | 7.1% | -87 | -0.6pp |
| 70 to 74 | 699 | 5.1% | 6.8% | 604 | 4.4% | 5.5% | +95 | +0.7pp |
| 75 to 79 | 497 | 3.6% | 4.8% | 389 | 2.8% | 3.9% | +108 | +0.8pp |
| 80 to 84 | 299 | 2.2% | 3.1% | 257 | 1.9% | 2.6% | +42 | +0.3pp |
| 85 and over | 246 | 1.8% | 2.8% | 237 | 1.7% | 2.7% | +9 | +0.1pp |
| Total | 13,829 | 100.0% | 100.0% | 13,808 | 100.0% | 100.0% | +21 | 0.0pp |