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, 55 to 59 year olds was the largest age group among residents in One Tree Hill, accounting for 11.7% (122 people). This share was higher than Playford (C) (5.8%). Since 2016, the biggest change was in 45 to 49 year olds, which decreased by 39 people and 3.2 percentage points.
Section overview
Age structure - Five year age groups
One Tree Hill - Total persons (Usual residence)
This table summarises five year age groups for One Tree Hill 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 One Tree Hill, with comparison markers for Playford (C).
0 to 4
2021 count
46
% of total
4.4%
Change from 2016
-0.2pp
46
4.4%
-0.2pp
5 to 9
2021 count
69
% of total
6.6%
Change from 2016
+0.4pp
69
6.6%
+0.4pp
10 to 14
2021 count
70
% of total
6.7%
Change from 2016
-0.5pp
70
6.7%
-0.5pp
15 to 19
2021 count
83
% of total
8.0%
Change from 2016
+0.1pp
83
8.0%
+0.1pp
20 to 24
2021 count
74
% of total
7.1%
Change from 2016
+0.5pp
74
7.1%
+0.5pp
25 to 29
2021 count
26
% of total
2.5%
Change from 2016
-2.6pp
26
2.5%
-2.6pp
30 to 34
2021 count
40
% of total
3.8%
Change from 2016
+0.4pp
40
3.8%
+0.4pp
35 to 39
2021 count
65
% of total
6.2%
Change from 2016
+2.5pp
65
6.2%
+2.5pp
40 to 44
2021 count
49
% of total
4.7%
Change from 2016
-2.1pp
49
4.7%
-2.1pp
45 to 49
2021 count
59
% of total
5.7%
Change from 2016
-3.2pp
59
5.7%
-3.2pp
50 to 54
2021 count
99
% of total
9.5%
Change from 2016
-1.7pp
99
9.5%
-1.7pp
55 to 59
2021 count
122
% of total
11.7%
Change from 2016
+1.6pp
122
11.7%
+1.6pp
60 to 64
2021 count
90
% of total
8.6%
Change from 2016
+0.8pp
90
8.6%
+0.8pp
65 to 69
2021 count
60
% of total
5.8%
Change from 2016
-0.3pp
60
5.8%
-0.3pp
70 to 74
2021 count
51
% of total
4.9%
Change from 2016
+0.3pp
51
4.9%
+0.3pp
75 to 79
2021 count
35
% of total
3.4%
Change from 2016
+1.3pp
35
3.4%
+1.3pp
80 to 84
2021 count
18
% of total
1.7%
Change from 2016
+0.8pp
18
1.7%
+0.8pp
85 and over
2021 count
12
% of total
1.2%
Change from 2016
-0.5pp
12
1.2%
-0.5pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-4
-0.2pp
5 to 9
+1
+0.4pp
10 to 14
-9
-0.5pp
15 to 19
-3
+0.1pp
20 to 24
+2
+0.5pp
25 to 29
-30
-2.6pp
30 to 34
+3
+0.4pp
35 to 39
+25
+2.5pp
40 to 44
-26
-2.1pp
45 to 49
-39
-3.2pp
50 to 54
-24
-1.7pp
55 to 59
+11
+1.6pp
60 to 64
+5
+0.8pp
65 to 69
-7
-0.3pp
70 to 74
+1
+0.3pp
75 to 79
+12
+1.3pp
80 to 84
+8
+0.8pp
85 and over
-7
-0.5pp
Data table
Five year age groups for One Tree Hill. 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 | 46 | 4.4% | 7.5% | 50 | 4.6% | 8.6% | -4 | -0.2pp |
| 5 to 9 | 69 | 6.6% | 8.0% | 68 | 6.2% | 7.9% | +1 | +0.4pp |
| 10 to 14 | 70 | 6.7% | 7.4% | 79 | 7.2% | 6.6% | -9 | -0.5pp |
| 15 to 19 | 83 | 8.0% | 6.2% | 86 | 7.9% | 6.7% | -3 | +0.1pp |
| 20 to 24 | 74 | 7.1% | 7.0% | 72 | 6.6% | 7.7% | +2 | +0.5pp |
| 25 to 29 | 26 | 2.5% | 8.2% | 56 | 5.1% | 7.9% | -30 | -2.6pp |
| 30 to 34 | 40 | 3.8% | 7.7% | 37 | 3.4% | 7.4% | +3 | +0.4pp |
| 35 to 39 | 65 | 6.2% | 7.1% | 40 | 3.7% | 6.1% | +25 | +2.5pp |
| 40 to 44 | 49 | 4.7% | 5.7% | 75 | 6.8% | 5.9% | -26 | -2.1pp |
| 45 to 49 | 59 | 5.7% | 5.7% | 98 | 8.9% | 6.2% | -39 | -3.2pp |
| 50 to 54 | 99 | 9.5% | 5.7% | 123 | 11.2% | 6.5% | -24 | -1.7pp |
| 55 to 59 | 122 | 11.7% | 5.8% | 111 | 10.1% | 5.8% | +11 | +1.6pp |
| 60 to 64 | 90 | 8.6% | 5.1% | 85 | 7.8% | 4.5% | +5 | +0.8pp |
| 65 to 69 | 60 | 5.8% | 4.0% | 67 | 6.1% | 3.9% | -7 | -0.3pp |
| 70 to 74 | 51 | 4.9% | 3.3% | 50 | 4.6% | 2.8% | +1 | +0.3pp |
| 75 to 79 | 35 | 3.4% | 2.2% | 23 | 2.1% | 2.3% | +12 | +1.3pp |
| 80 to 84 | 18 | 1.7% | 1.7% | 10 | 0.9% | 1.7% | +8 | +0.8pp |
| 85 and over | 12 | 1.2% | 1.6% | 19 | 1.7% | 1.5% | -7 | -0.5pp |
| Total | 1,043 | 100.0% | 100.0% | 1,095 | 100.0% | 100.0% | -52 | 0.0pp |