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 Middlemount, accounting for 12.3% (233 people). This share was higher than Isaac (R) (9.3%). Since 2016, the biggest change was in 5 to 9 year olds, which decreased by 73 people and 4.2 percentage points.
Section overview
Age structure - Five year age groups
Middlemount - Total persons (Usual residence)
This table summarises five year age groups for Middlemount in 2021 for persons, with comparison against Isaac (R) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Middlemount, with comparison markers for Isaac (R).
0 to 4
2021 count
157
% of total
8.3%
Change from 2016
-3.4pp
157
8.3%
-3.4pp
5 to 9
2021 count
128
% of total
6.7%
Change from 2016
-4.2pp
128
6.7%
-4.2pp
10 to 14
2021 count
96
% of total
5.1%
Change from 2016
-0.4pp
96
5.1%
-0.4pp
15 to 19
2021 count
65
% of total
3.4%
Change from 2016
-0.7pp
65
3.4%
-0.7pp
20 to 24
2021 count
173
% of total
9.1%
Change from 2016
+2.9pp
173
9.1%
+2.9pp
25 to 29
2021 count
233
% of total
12.3%
Change from 2016
+1.9pp
233
12.3%
+1.9pp
30 to 34
2021 count
212
% of total
11.2%
Change from 2016
-2.5pp
212
11.2%
-2.5pp
35 to 39
2021 count
203
% of total
10.7%
Change from 2016
-0.2pp
203
10.7%
-0.2pp
40 to 44
2021 count
143
% of total
7.5%
Change from 2016
-1.0pp
143
7.5%
-1.0pp
45 to 49
2021 count
145
% of total
7.6%
Change from 2016
+2.2pp
145
7.6%
+2.2pp
50 to 54
2021 count
133
% of total
7.0%
Change from 2016
+0.6pp
133
7.0%
+0.6pp
55 to 59
2021 count
124
% of total
6.5%
Change from 2016
+2.1pp
124
6.5%
+2.1pp
60 to 64
2021 count
55
% of total
2.9%
Change from 2016
+0.6pp
55
2.9%
+0.6pp
65 to 69
2021 count
33
% of total
1.7%
Change from 2016
+0.7pp
33
1.7%
+0.7pp
70 to 74
2021 count
0
% of total
0.0%
Change from 2016
0.0pp
0
0.0%
0.0pp
75 to 79
2021 count
0
% of total
0.0%
Change from 2016
0.0pp
0
0.0%
0.0pp
80 to 84
2021 count
0
% of total
0.0%
Change from 2016
0.0pp
0
0.0%
0.0pp
85 and over
2021 count
0
% of total
0.0%
Change from 2016
0.0pp
0
0.0%
0.0pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-59
-3.4pp
5 to 9
-73
-4.2pp
10 to 14
-5
-0.4pp
15 to 19
-10
-0.7pp
20 to 24
+59
+2.9pp
25 to 29
+41
+1.9pp
30 to 34
-41
-2.5pp
35 to 39
+3
-0.2pp
40 to 44
-14
-1.0pp
45 to 49
+45
+2.2pp
50 to 54
+16
+0.6pp
55 to 59
+43
+2.1pp
60 to 64
+12
+0.6pp
65 to 69
+15
+0.7pp
70 to 74
0
0.0pp
75 to 79
0
0.0pp
80 to 84
0
0.0pp
85 and over
0
0.0pp
Data table
Five year age groups for Middlemount. Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Isaac (R).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Isaac (R)% | Count | % | Isaac (R)% | Count | pp | |
| 0 to 4 | 157 | 8.3% | 7.2% | 216 | 11.7% | 9.7% | -59 | -3.4pp |
| 5 to 9 | 128 | 6.7% | 7.9% | 201 | 10.9% | 9.2% | -73 | -4.2pp |
| 10 to 14 | 96 | 5.1% | 6.3% | 101 | 5.5% | 6.4% | -5 | -0.4pp |
| 15 to 19 | 65 | 3.4% | 4.9% | 75 | 4.1% | 4.9% | -10 | -0.7pp |
| 20 to 24 | 173 | 9.1% | 6.8% | 114 | 6.2% | 6.1% | +59 | +2.9pp |
| 25 to 29 | 233 | 12.3% | 9.3% | 192 | 10.4% | 8.8% | +41 | +1.9pp |
| 30 to 34 | 212 | 11.2% | 9.5% | 253 | 13.7% | 10.3% | -41 | -2.5pp |
| 35 to 39 | 203 | 10.7% | 9.1% | 200 | 10.9% | 8.6% | +3 | -0.2pp |
| 40 to 44 | 143 | 7.5% | 7.3% | 157 | 8.5% | 8.0% | -14 | -1.0pp |
| 45 to 49 | 145 | 7.6% | 7.3% | 100 | 5.4% | 6.6% | +45 | +2.2pp |
| 50 to 54 | 133 | 7.0% | 6.8% | 117 | 6.4% | 6.7% | +16 | +0.6pp |
| 55 to 59 | 124 | 6.5% | 6.3% | 81 | 4.4% | 5.5% | +43 | +2.1pp |
| 60 to 64 | 55 | 2.9% | 4.6% | 43 | 2.3% | 3.8% | +12 | +0.6pp |
| 65 to 69 | 33 | 1.7% | 2.7% | 18 | 1.0% | 2.4% | +15 | +0.7pp |
| 70 to 74 | 0 | 0.0% | 1.9% | 0 | 0.0% | 1.4% | 0 | 0.0pp |
| 75 to 79 | 0 | 0.0% | 1.1% | 0 | 0.0% | 0.8% | 0 | 0.0pp |
| 80 to 84 | 0 | 0.0% | 0.6% | 0 | 0.0% | 0.4% | 0 | 0.0pp |
| 85 and over | 0 | 0.0% | 0.5% | 0 | 0.0% | 0.4% | 0 | 0.0pp |
| Total | 1,899 | 100.0% | 100.0% | 1,841 | 100.0% | 100.0% | +58 | 0.0pp |