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, 60 to 64 year olds was the largest age group among residents in Irvingdale (part), accounting for 12.3% (20 people). This share was higher than Western Downs (R) (5.9%). Since 2016, the biggest change was in 5 to 9 year olds, which decreased by 193 people, while its share rose by 2.5 percentage points.
Section overview
Age structure - Five year age groups
Irvingdale (part) - Total persons (Usual residence)
This table summarises five year age groups for Irvingdale (part) in 2021 for persons, with comparison against Western Downs (R) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Irvingdale (part), with comparison markers for Western Downs (R).
0 to 4
2021 count
13
% of total
8.0%
Change from 2016
+1.8pp
13
8.0%
+1.8pp
5 to 9
2021 count
19
% of total
11.7%
Change from 2016
+2.5pp
19
11.7%
+2.5pp
10 to 14
2021 count
8
% of total
4.9%
Change from 2016
-3.4pp
8
4.9%
-3.4pp
15 to 19
2021 count
3
% of total
1.8%
Change from 2016
-3.6pp
3
1.8%
-3.6pp
20 to 24
2021 count
4
% of total
2.5%
Change from 2016
-1.6pp
4
2.5%
-1.6pp
25 to 29
2021 count
7
% of total
4.3%
Change from 2016
-0.2pp
7
4.3%
-0.2pp
30 to 34
2021 count
0
% of total
0.0%
Change from 2016
-5.6pp
0
0.0%
-5.6pp
35 to 39
2021 count
15
% of total
9.2%
Change from 2016
+2.4pp
15
9.2%
+2.4pp
40 to 44
2021 count
14
% of total
8.6%
Change from 2016
+1.6pp
14
8.6%
+1.6pp
45 to 49
2021 count
13
% of total
8.0%
Change from 2016
+1.5pp
13
8.0%
+1.5pp
50 to 54
2021 count
16
% of total
9.8%
Change from 2016
+3.3pp
16
9.8%
+3.3pp
55 to 59
2021 count
11
% of total
6.7%
Change from 2016
-0.1pp
11
6.7%
-0.1pp
60 to 64
2021 count
20
% of total
12.3%
Change from 2016
+5.1pp
20
12.3%
+5.1pp
65 to 69
2021 count
5
% of total
3.1%
Change from 2016
-3.7pp
5
3.1%
-3.7pp
70 to 74
2021 count
3
% of total
1.8%
Change from 2016
-2.2pp
3
1.8%
-2.2pp
75 to 79
2021 count
0
% of total
0.0%
Change from 2016
-2.6pp
0
0.0%
-2.6pp
80 to 84
2021 count
7
% of total
4.3%
Change from 2016
+2.7pp
7
4.3%
+2.7pp
85 and over
2021 count
0
% of total
0.0%
Change from 2016
-0.7pp
0
0.0%
-0.7pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-129
+1.8pp
5 to 9
-193
+2.5pp
10 to 14
-184
-3.4pp
15 to 19
-121
-3.6pp
20 to 24
-91
-1.6pp
25 to 29
-97
-0.2pp
30 to 34
-130
-5.6pp
35 to 39
-142
+2.4pp
40 to 44
-147
+1.6pp
45 to 49
-137
+1.5pp
50 to 54
-133
+3.3pp
55 to 59
-146
-0.1pp
60 to 64
-146
+5.1pp
65 to 69
-151
-3.7pp
70 to 74
-88
-2.2pp
75 to 79
-61
-2.6pp
80 to 84
-29
+2.7pp
85 and over
-16
-0.7pp
Data table
Five year age groups for Irvingdale (part). Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Western Downs (R).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Western Downs (R)% | Count | % | Western Downs (R)% | Count | pp | |
| 0 to 4 | 13 | 8.0% | 6.6% | 142 | 6.2% | 7.2% | -129 | +1.8pp |
| 5 to 9 | 19 | 11.7% | 7.3% | 212 | 9.2% | 7.8% | -193 | +2.5pp |
| 10 to 14 | 8 | 4.9% | 7.5% | 192 | 8.3% | 7.1% | -184 | -3.4pp |
| 15 to 19 | 3 | 1.8% | 6.0% | 124 | 5.4% | 6.3% | -121 | -3.6pp |
| 20 to 24 | 4 | 2.5% | 5.7% | 95 | 4.1% | 5.7% | -91 | -1.6pp |
| 25 to 29 | 7 | 4.3% | 6.8% | 104 | 4.5% | 6.2% | -97 | -0.2pp |
| 30 to 34 | 0 | 0.0% | 6.2% | 130 | 5.6% | 6.2% | -130 | -5.6pp |
| 35 to 39 | 15 | 9.2% | 6.1% | 157 | 6.8% | 5.9% | -142 | +2.4pp |
| 40 to 44 | 14 | 8.6% | 5.6% | 161 | 7.0% | 6.8% | -147 | +1.6pp |
| 45 to 49 | 13 | 8.0% | 6.2% | 150 | 6.5% | 6.8% | -137 | +1.5pp |
| 50 to 54 | 16 | 9.8% | 6.5% | 149 | 6.5% | 6.7% | -133 | +3.3pp |
| 55 to 59 | 11 | 6.7% | 6.4% | 157 | 6.8% | 6.2% | -146 | -0.1pp |
| 60 to 64 | 20 | 12.3% | 5.9% | 166 | 7.2% | 5.5% | -146 | +5.1pp |
| 65 to 69 | 5 | 3.1% | 5.3% | 156 | 6.8% | 5.2% | -151 | -3.7pp |
| 70 to 74 | 3 | 1.8% | 4.5% | 91 | 4.0% | 3.9% | -88 | -2.2pp |
| 75 to 79 | 0 | 0.0% | 3.3% | 61 | 2.6% | 2.8% | -61 | -2.6pp |
| 80 to 84 | 7 | 4.3% | 2.1% | 36 | 1.6% | 1.9% | -29 | +2.7pp |
| 85 and over | 0 | 0.0% | 1.8% | 16 | 0.7% | 1.8% | -16 | -0.7pp |
| Total | 163 | 100.0% | 100.0% | 2,302 | 100.0% | 100.0% | -2,139 | 0.0pp |