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 Hackham West, accounting for 7.3% (265 people). This share was higher than Onkaparinga (C) (6%). Since 2016, the biggest change was in 70 to 74 year olds, which increased by 66 people and 1.7 percentage points.
Section overview
Age structure - Five year age groups
Hackham West - Total persons (Usual residence)
This table summarises five year age groups for Hackham West 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 Hackham West, with comparison markers for Onkaparinga (C).
0 to 4
2021 count
171
% of total
4.7%
Change from 2016
-1.1pp
171
4.7%
-1.1pp
5 to 9
2021 count
222
% of total
6.1%
Change from 2016
+0.6pp
222
6.1%
+0.6pp
10 to 14
2021 count
231
% of total
6.4%
Change from 2016
+1.6pp
231
6.4%
+1.6pp
15 to 19
2021 count
185
% of total
5.1%
Change from 2016
-0.8pp
185
5.1%
-0.8pp
20 to 24
2021 count
214
% of total
5.9%
Change from 2016
-0.3pp
214
5.9%
-0.3pp
25 to 29
2021 count
265
% of total
7.3%
Change from 2016
+0.2pp
265
7.3%
+0.2pp
30 to 34
2021 count
248
% of total
6.9%
Change from 2016
+0.2pp
248
6.9%
+0.2pp
35 to 39
2021 count
226
% of total
6.2%
Change from 2016
-0.5pp
226
6.2%
-0.5pp
40 to 44
2021 count
213
% of total
5.9%
Change from 2016
+0.2pp
213
5.9%
+0.2pp
45 to 49
2021 count
221
% of total
6.1%
Change from 2016
-1.0pp
221
6.1%
-1.0pp
50 to 54
2021 count
256
% of total
7.1%
Change from 2016
+1.1pp
256
7.1%
+1.1pp
55 to 59
2021 count
224
% of total
6.2%
Change from 2016
-1.5pp
224
6.2%
-1.5pp
60 to 64
2021 count
238
% of total
6.6%
Change from 2016
-1.0pp
238
6.6%
-1.0pp
65 to 69
2021 count
249
% of total
6.9%
Change from 2016
-0.3pp
249
6.9%
-0.3pp
70 to 74
2021 count
225
% of total
6.2%
Change from 2016
+1.7pp
225
6.2%
+1.7pp
75 to 79
2021 count
122
% of total
3.4%
Change from 2016
+0.8pp
122
3.4%
+0.8pp
80 to 84
2021 count
57
% of total
1.6%
Change from 2016
+0.1pp
57
1.6%
+0.1pp
85 and over
2021 count
40
% of total
1.1%
Change from 2016
-0.5pp
40
1.1%
-0.5pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-35
-1.1pp
5 to 9
+26
+0.6pp
10 to 14
+62
+1.6pp
15 to 19
-24
-0.8pp
20 to 24
-7
-0.3pp
25 to 29
+13
+0.2pp
30 to 34
+10
+0.2pp
35 to 39
-11
-0.5pp
40 to 44
+12
+0.2pp
45 to 49
-30
-1.0pp
50 to 54
+43
+1.1pp
55 to 59
-49
-1.5pp
60 to 64
-31
-1.0pp
65 to 69
-7
-0.3pp
70 to 74
+66
+1.7pp
75 to 79
+28
+0.8pp
80 to 84
+5
+0.1pp
85 and over
-16
-0.5pp
Data table
Five year age groups for Hackham West. 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 | 171 | 4.7% | 5.4% | 206 | 5.8% | 6.2% | -35 | -1.1pp |
| 5 to 9 | 222 | 6.1% | 6.2% | 196 | 5.5% | 6.4% | +26 | +0.6pp |
| 10 to 14 | 231 | 6.4% | 6.2% | 169 | 4.8% | 6.1% | +62 | +1.6pp |
| 15 to 19 | 185 | 5.1% | 5.8% | 209 | 5.9% | 6.2% | -24 | -0.8pp |
| 20 to 24 | 214 | 5.9% | 5.6% | 221 | 6.2% | 6.0% | -7 | -0.3pp |
| 25 to 29 | 265 | 7.3% | 6.0% | 252 | 7.1% | 5.9% | +13 | +0.2pp |
| 30 to 34 | 248 | 6.9% | 6.3% | 238 | 6.7% | 6.5% | +10 | +0.2pp |
| 35 to 39 | 226 | 6.2% | 6.7% | 237 | 6.7% | 6.3% | -11 | -0.5pp |
| 40 to 44 | 213 | 5.9% | 6.1% | 201 | 5.7% | 6.6% | +12 | +0.2pp |
| 45 to 49 | 221 | 6.1% | 6.4% | 251 | 7.1% | 6.9% | -30 | -1.0pp |
| 50 to 54 | 256 | 7.1% | 6.6% | 213 | 6.0% | 6.7% | +43 | +1.1pp |
| 55 to 59 | 224 | 6.2% | 6.5% | 273 | 7.7% | 6.6% | -49 | -1.5pp |
| 60 to 64 | 238 | 6.6% | 6.3% | 269 | 7.6% | 6.3% | -31 | -1.0pp |
| 65 to 69 | 249 | 6.9% | 5.9% | 256 | 7.2% | 6.1% | -7 | -0.3pp |
| 70 to 74 | 225 | 6.2% | 5.7% | 159 | 4.5% | 4.3% | +66 | +1.7pp |
| 75 to 79 | 122 | 3.4% | 3.8% | 94 | 2.6% | 2.8% | +28 | +0.8pp |
| 80 to 84 | 57 | 1.6% | 2.3% | 52 | 1.5% | 2.0% | +5 | +0.1pp |
| 85 and over | 40 | 1.1% | 2.2% | 56 | 1.6% | 2.1% | -16 | -0.5pp |
| Total | 3,620 | 100.0% | 100.0% | 3,548 | 100.0% | 100.0% | +72 | 0.0pp |