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, 5 to 9 year olds was the largest age group among residents in Smithfield (SA), accounting for 7.5% (186 people). This share was lower than Playford (C) (8%). Since 2016, the biggest change was in 10 to 14 year olds, which increased by 57 people and 2.2 percentage points.
Section overview
Age structure - Five year age groups
Smithfield (SA) - Total persons (Usual residence)
This table summarises five year age groups for Smithfield (SA) in 2021 for persons, with comparison against Playford (C) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Smithfield (SA), with comparison markers for Playford (C).
0 to 4
2021 count
184
% of total
7.4%
Change from 2016
-1.5pp
184
7.4%
-1.5pp
5 to 9
2021 count
186
% of total
7.5%
Change from 2016
0.0pp
186
7.5%
0.0pp
10 to 14
2021 count
169
% of total
6.8%
Change from 2016
+2.2pp
169
6.8%
+2.2pp
15 to 19
2021 count
167
% of total
6.7%
Change from 2016
0.0pp
167
6.7%
0.0pp
20 to 24
2021 count
165
% of total
6.6%
Change from 2016
-2.1pp
165
6.6%
-2.1pp
25 to 29
2021 count
183
% of total
7.4%
Change from 2016
-1.2pp
183
7.4%
-1.2pp
30 to 34
2021 count
174
% of total
7.0%
Change from 2016
+0.1pp
174
7.0%
+0.1pp
35 to 39
2021 count
170
% of total
6.8%
Change from 2016
+1.5pp
170
6.8%
+1.5pp
40 to 44
2021 count
117
% of total
4.7%
Change from 2016
-0.4pp
117
4.7%
-0.4pp
45 to 49
2021 count
147
% of total
5.9%
Change from 2016
+1.2pp
147
5.9%
+1.2pp
50 to 54
2021 count
132
% of total
5.3%
Change from 2016
0.0pp
132
5.3%
0.0pp
55 to 59
2021 count
133
% of total
5.4%
Change from 2016
-1.0pp
133
5.4%
-1.0pp
60 to 64
2021 count
153
% of total
6.2%
Change from 2016
+1.4pp
153
6.2%
+1.4pp
65 to 69
2021 count
120
% of total
4.8%
Change from 2016
+0.8pp
120
4.8%
+0.8pp
70 to 74
2021 count
84
% of total
3.4%
Change from 2016
-0.3pp
84
3.4%
-0.3pp
75 to 79
2021 count
73
% of total
2.9%
Change from 2016
+0.4pp
73
2.9%
+0.4pp
80 to 84
2021 count
67
% of total
2.7%
Change from 2016
+0.6pp
67
2.7%
+0.6pp
85 and over
2021 count
60
% of total
2.4%
Change from 2016
-0.2pp
60
2.4%
-0.2pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-33
-1.5pp
5 to 9
+4
0.0pp
10 to 14
+57
+2.2pp
15 to 19
+5
0.0pp
20 to 24
-45
-2.1pp
25 to 29
-25
-1.2pp
30 to 34
+6
+0.1pp
35 to 39
+42
+1.5pp
40 to 44
-7
-0.4pp
45 to 49
+34
+1.2pp
50 to 54
+4
0.0pp
55 to 59
-22
-1.0pp
60 to 64
+37
+1.4pp
65 to 69
+22
+0.8pp
70 to 74
-6
-0.3pp
75 to 79
+12
+0.4pp
80 to 84
+17
+0.6pp
85 and over
-2
-0.2pp
Data table
Five year age groups for Smithfield (SA). Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Playford (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Playford (C)% | Count | % | Playford (C)% | Count | pp | |
| 0 to 4 | 184 | 7.4% | 7.5% | 217 | 8.9% | 8.6% | -33 | -1.5pp |
| 5 to 9 | 186 | 7.5% | 8.0% | 182 | 7.5% | 7.9% | +4 | 0.0pp |
| 10 to 14 | 169 | 6.8% | 7.4% | 112 | 4.6% | 6.6% | +57 | +2.2pp |
| 15 to 19 | 167 | 6.7% | 6.2% | 162 | 6.7% | 6.7% | +5 | 0.0pp |
| 20 to 24 | 165 | 6.6% | 7.0% | 210 | 8.7% | 7.7% | -45 | -2.1pp |
| 25 to 29 | 183 | 7.4% | 8.2% | 208 | 8.6% | 7.9% | -25 | -1.2pp |
| 30 to 34 | 174 | 7.0% | 7.7% | 168 | 6.9% | 7.4% | +6 | +0.1pp |
| 35 to 39 | 170 | 6.8% | 7.1% | 128 | 5.3% | 6.1% | +42 | +1.5pp |
| 40 to 44 | 117 | 4.7% | 5.7% | 124 | 5.1% | 5.9% | -7 | -0.4pp |
| 45 to 49 | 147 | 5.9% | 5.7% | 113 | 4.7% | 6.2% | +34 | +1.2pp |
| 50 to 54 | 132 | 5.3% | 5.7% | 128 | 5.3% | 6.5% | +4 | 0.0pp |
| 55 to 59 | 133 | 5.4% | 5.8% | 155 | 6.4% | 5.8% | -22 | -1.0pp |
| 60 to 64 | 153 | 6.2% | 5.1% | 116 | 4.8% | 4.5% | +37 | +1.4pp |
| 65 to 69 | 120 | 4.8% | 4.0% | 98 | 4.0% | 3.9% | +22 | +0.8pp |
| 70 to 74 | 84 | 3.4% | 3.3% | 90 | 3.7% | 2.8% | -6 | -0.3pp |
| 75 to 79 | 73 | 2.9% | 2.2% | 61 | 2.5% | 2.3% | +12 | +0.4pp |
| 80 to 84 | 67 | 2.7% | 1.7% | 50 | 2.1% | 1.7% | +17 | +0.6pp |
| 85 and over | 60 | 2.4% | 1.6% | 62 | 2.6% | 1.5% | -2 | -0.2pp |
| Total | 2,482 | 100.0% | 100.0% | 2,426 | 100.0% | 100.0% | +56 | 0.0pp |