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, 35 to 39 year olds was the largest age group among residents in Port Noarlunga South, accounting for 7.5% (228 people). This share was higher than Onkaparinga (C) (6.7%). Since 2016, the biggest change was in 10 to 14 year olds, which increased by 57 people and 1.3 percentage points.
Section overview
Age structure - Five year age groups
Port Noarlunga South - Total persons (Usual residence)
This table summarises five year age groups for Port Noarlunga South 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 Port Noarlunga South, with comparison markers for Onkaparinga (C).
0 to 4
2021 count
194
% of total
6.3%
Change from 2016
+0.5pp
194
6.3%
+0.5pp
5 to 9
2021 count
204
% of total
6.7%
Change from 2016
+0.3pp
204
6.7%
+0.3pp
10 to 14
2021 count
188
% of total
6.1%
Change from 2016
+1.3pp
188
6.1%
+1.3pp
15 to 19
2021 count
151
% of total
4.9%
Change from 2016
-1.4pp
151
4.9%
-1.4pp
20 to 24
2021 count
162
% of total
5.3%
Change from 2016
-0.6pp
162
5.3%
-0.6pp
25 to 29
2021 count
205
% of total
6.7%
Change from 2016
+0.4pp
205
6.7%
+0.4pp
30 to 34
2021 count
212
% of total
6.9%
Change from 2016
+0.4pp
212
6.9%
+0.4pp
35 to 39
2021 count
228
% of total
7.5%
Change from 2016
+1.0pp
228
7.5%
+1.0pp
40 to 44
2021 count
193
% of total
6.3%
Change from 2016
-1.8pp
193
6.3%
-1.8pp
45 to 49
2021 count
218
% of total
7.1%
Change from 2016
-0.8pp
218
7.1%
-0.8pp
50 to 54
2021 count
198
% of total
6.5%
Change from 2016
+0.7pp
198
6.5%
+0.7pp
55 to 59
2021 count
187
% of total
6.1%
Change from 2016
-0.4pp
187
6.1%
-0.4pp
60 to 64
2021 count
179
% of total
5.9%
Change from 2016
-0.7pp
179
5.9%
-0.7pp
65 to 69
2021 count
191
% of total
6.2%
Change from 2016
-1.1pp
191
6.2%
-1.1pp
70 to 74
2021 count
165
% of total
5.4%
Change from 2016
+1.3pp
165
5.4%
+1.3pp
75 to 79
2021 count
103
% of total
3.4%
Change from 2016
+0.4pp
103
3.4%
+0.4pp
80 to 84
2021 count
63
% of total
2.1%
Change from 2016
+0.7pp
63
2.1%
+0.7pp
85 and over
2021 count
43
% of total
1.4%
Change from 2016
+0.1pp
43
1.4%
+0.1pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
+35
+0.5pp
5 to 9
+30
+0.3pp
10 to 14
+57
+1.3pp
15 to 19
-21
-1.4pp
20 to 24
0
-0.6pp
25 to 29
+32
+0.4pp
30 to 34
+35
+0.4pp
35 to 39
+49
+1.0pp
40 to 44
-28
-1.8pp
45 to 49
+1
-0.8pp
50 to 54
+39
+0.7pp
55 to 59
+8
-0.4pp
60 to 64
-1
-0.7pp
65 to 69
-9
-1.1pp
70 to 74
+54
+1.3pp
75 to 79
+20
+0.4pp
80 to 84
+24
+0.7pp
85 and over
+8
+0.1pp
Data table
Five year age groups for Port Noarlunga South. 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 | 194 | 6.3% | 5.4% | 159 | 5.8% | 6.2% | +35 | +0.5pp |
| 5 to 9 | 204 | 6.7% | 6.2% | 174 | 6.4% | 6.4% | +30 | +0.3pp |
| 10 to 14 | 188 | 6.1% | 6.2% | 131 | 4.8% | 6.1% | +57 | +1.3pp |
| 15 to 19 | 151 | 4.9% | 5.8% | 172 | 6.3% | 6.2% | -21 | -1.4pp |
| 20 to 24 | 162 | 5.3% | 5.6% | 162 | 5.9% | 6.0% | 0 | -0.6pp |
| 25 to 29 | 205 | 6.7% | 6.0% | 173 | 6.3% | 5.9% | +32 | +0.4pp |
| 30 to 34 | 212 | 6.9% | 6.3% | 177 | 6.5% | 6.5% | +35 | +0.4pp |
| 35 to 39 | 228 | 7.5% | 6.7% | 179 | 6.5% | 6.3% | +49 | +1.0pp |
| 40 to 44 | 193 | 6.3% | 6.1% | 221 | 8.1% | 6.6% | -28 | -1.8pp |
| 45 to 49 | 218 | 7.1% | 6.4% | 217 | 7.9% | 6.9% | +1 | -0.8pp |
| 50 to 54 | 198 | 6.5% | 6.6% | 159 | 5.8% | 6.7% | +39 | +0.7pp |
| 55 to 59 | 187 | 6.1% | 6.5% | 179 | 6.5% | 6.6% | +8 | -0.4pp |
| 60 to 64 | 179 | 5.9% | 6.3% | 180 | 6.6% | 6.3% | -1 | -0.7pp |
| 65 to 69 | 191 | 6.2% | 5.9% | 200 | 7.3% | 6.1% | -9 | -1.1pp |
| 70 to 74 | 165 | 5.4% | 5.7% | 111 | 4.1% | 4.3% | +54 | +1.3pp |
| 75 to 79 | 103 | 3.4% | 3.8% | 83 | 3.0% | 2.8% | +20 | +0.4pp |
| 80 to 84 | 63 | 2.1% | 2.3% | 39 | 1.4% | 2.0% | +24 | +0.7pp |
| 85 and over | 43 | 1.4% | 2.2% | 35 | 1.3% | 2.1% | +8 | +0.1pp |
| Total | 3,058 | 100.0% | 100.0% | 2,734 | 100.0% | 100.0% | +324 | 0.0pp |