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 Koorawatha (part), accounting for 10.2% (46 people). This share was higher than Hilltops (A) (7.1%). Since 2016, the biggest change was in 25 to 29 year olds, which increased by 20 people and 4.4 percentage points.
Section overview
Age structure - Five year age groups
Koorawatha (part) - Total persons (Usual residence)
This table summarises five year age groups for Koorawatha (part) in 2021 for persons, with comparison against Hilltops (A) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Koorawatha (part), with comparison markers for Hilltops (A).
0 to 4
2021 count
13
% of total
2.9%
Change from 2016
-1.1pp
13
2.9%
-1.1pp
5 to 9
2021 count
19
% of total
4.2%
Change from 2016
-2.6pp
19
4.2%
-2.6pp
10 to 14
2021 count
28
% of total
6.2%
Change from 2016
-0.8pp
28
6.2%
-0.8pp
15 to 19
2021 count
23
% of total
5.1%
Change from 2016
+0.4pp
23
5.1%
+0.4pp
20 to 24
2021 count
19
% of total
4.2%
Change from 2016
+0.7pp
19
4.2%
+0.7pp
25 to 29
2021 count
23
% of total
5.1%
Change from 2016
+4.4pp
23
5.1%
+4.4pp
30 to 34
2021 count
14
% of total
3.1%
Change from 2016
-0.2pp
14
3.1%
-0.2pp
35 to 39
2021 count
12
% of total
2.7%
Change from 2016
-3.2pp
12
2.7%
-3.2pp
40 to 44
2021 count
29
% of total
6.4%
Change from 2016
-1.1pp
29
6.4%
-1.1pp
45 to 49
2021 count
19
% of total
4.2%
Change from 2016
-1.2pp
19
4.2%
-1.2pp
50 to 54
2021 count
32
% of total
7.1%
Change from 2016
-2.5pp
32
7.1%
-2.5pp
55 to 59
2021 count
46
% of total
10.2%
Change from 2016
+2.2pp
46
10.2%
+2.2pp
60 to 64
2021 count
41
% of total
9.1%
Change from 2016
-1.0pp
41
9.1%
-1.0pp
65 to 69
2021 count
30
% of total
6.7%
Change from 2016
-2.9pp
30
6.7%
-2.9pp
70 to 74
2021 count
46
% of total
10.2%
Change from 2016
+2.9pp
46
10.2%
+2.9pp
75 to 79
2021 count
16
% of total
3.6%
Change from 2016
-2.0pp
16
3.6%
-2.0pp
80 to 84
2021 count
16
% of total
3.6%
Change from 2016
+1.3pp
16
3.6%
+1.3pp
85 and over
2021 count
0
% of total
0.0%
Change from 2016
-1.6pp
0
0.0%
-1.6pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-4
-1.1pp
5 to 9
-10
-2.6pp
10 to 14
-2
-0.8pp
15 to 19
+3
+0.4pp
20 to 24
+4
+0.7pp
25 to 29
+20
+4.4pp
30 to 34
0
-0.2pp
35 to 39
-13
-3.2pp
40 to 44
-3
-1.1pp
45 to 49
-4
-1.2pp
50 to 54
-9
-2.5pp
55 to 59
+12
+2.2pp
60 to 64
-2
-1.0pp
65 to 69
-11
-2.9pp
70 to 74
+15
+2.9pp
75 to 79
-8
-2.0pp
80 to 84
+6
+1.3pp
85 and over
-7
-1.6pp
Data table
Five year age groups for Koorawatha (part). Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Hilltops (A).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Hilltops (A)% | Count | % | Hilltops (A)% | Count | pp | |
| 0 to 4 | 13 | 2.9% | 5.9% | 17 | 4.0% | 6.0% | -4 | -1.1pp |
| 5 to 9 | 19 | 4.2% | 6.4% | 29 | 6.8% | 7.1% | -10 | -2.6pp |
| 10 to 14 | 28 | 6.2% | 6.7% | 30 | 7.0% | 6.5% | -2 | -0.8pp |
| 15 to 19 | 23 | 5.1% | 5.8% | 20 | 4.7% | 6.2% | +3 | +0.4pp |
| 20 to 24 | 19 | 4.2% | 4.6% | 15 | 3.5% | 4.8% | +4 | +0.7pp |
| 25 to 29 | 23 | 5.1% | 5.0% | 3 | 0.7% | 4.4% | +20 | +4.4pp |
| 30 to 34 | 14 | 3.1% | 5.2% | 14 | 3.3% | 4.6% | 0 | -0.2pp |
| 35 to 39 | 12 | 2.7% | 5.0% | 25 | 5.9% | 5.1% | -13 | -3.2pp |
| 40 to 44 | 29 | 6.4% | 5.2% | 32 | 7.5% | 5.7% | -3 | -1.1pp |
| 45 to 49 | 19 | 4.2% | 5.6% | 23 | 5.4% | 6.2% | -4 | -1.2pp |
| 50 to 54 | 32 | 7.1% | 6.3% | 41 | 9.6% | 6.9% | -9 | -2.5pp |
| 55 to 59 | 46 | 10.2% | 7.1% | 34 | 8.0% | 6.9% | +12 | +2.2pp |
| 60 to 64 | 41 | 9.1% | 7.1% | 43 | 10.1% | 6.8% | -2 | -1.0pp |
| 65 to 69 | 30 | 6.7% | 6.6% | 41 | 9.6% | 7.5% | -11 | -2.9pp |
| 70 to 74 | 46 | 10.2% | 6.9% | 31 | 7.3% | 5.5% | +15 | +2.9pp |
| 75 to 79 | 16 | 3.6% | 4.6% | 24 | 5.6% | 4.1% | -8 | -2.0pp |
| 80 to 84 | 16 | 3.6% | 3.2% | 10 | 2.3% | 2.7% | +6 | +1.3pp |
| 85 and over | 0 | 0.0% | 2.8% | 7 | 1.6% | 2.8% | -7 | -1.6pp |
| Total | 450 | 100.0% | 100.0% | 427 | 100.0% | 100.0% | +23 | 0.0pp |