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 Katherine, accounting for 12.6% (158 people). This share was higher than Katherine (T) (9.2%). Since 2016, the biggest change was in 50 to 54 year olds, which decreased by 50 people and 2.4 percentage points.
Section overview
Age structure - Five year age groups
Katherine - Total persons (Usual residence)
This table summarises five year age groups for Katherine in 2021 for persons, with comparison against Katherine (T) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Katherine, with comparison markers for Katherine (T).
0 to 4
2021 count
59
% of total
4.7%
Change from 2016
-1.7pp
59
4.7%
-1.7pp
5 to 9
2021 count
67
% of total
5.3%
Change from 2016
+0.1pp
67
5.3%
+0.1pp
10 to 14
2021 count
67
% of total
5.3%
Change from 2016
-0.3pp
67
5.3%
-0.3pp
15 to 19
2021 count
52
% of total
4.1%
Change from 2016
-0.5pp
52
4.1%
-0.5pp
20 to 24
2021 count
92
% of total
7.3%
Change from 2016
-1.0pp
92
7.3%
-1.0pp
25 to 29
2021 count
158
% of total
12.6%
Change from 2016
+2.2pp
158
12.6%
+2.2pp
30 to 34
2021 count
139
% of total
11.1%
Change from 2016
+1.7pp
139
11.1%
+1.7pp
35 to 39
2021 count
89
% of total
7.1%
Change from 2016
+0.8pp
89
7.1%
+0.8pp
40 to 44
2021 count
65
% of total
5.2%
Change from 2016
-0.4pp
65
5.2%
-0.4pp
45 to 49
2021 count
79
% of total
6.3%
Change from 2016
-0.8pp
79
6.3%
-0.8pp
50 to 54
2021 count
75
% of total
6.0%
Change from 2016
-2.4pp
75
6.0%
-2.4pp
55 to 59
2021 count
79
% of total
6.3%
Change from 2016
-0.3pp
79
6.3%
-0.3pp
60 to 64
2021 count
73
% of total
5.8%
Change from 2016
-0.5pp
73
5.8%
-0.5pp
65 to 69
2021 count
67
% of total
5.3%
Change from 2016
+1.8pp
67
5.3%
+1.8pp
70 to 74
2021 count
45
% of total
3.6%
Change from 2016
+0.6pp
45
3.6%
+0.6pp
75 to 79
2021 count
20
% of total
1.6%
Change from 2016
-0.6pp
20
1.6%
-0.6pp
80 to 84
2021 count
12
% of total
1.0%
Change from 2016
+0.3pp
12
1.0%
+0.3pp
85 and over
2021 count
18
% of total
1.4%
Change from 2016
-0.2pp
18
1.4%
-0.2pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-36
-1.7pp
5 to 9
-10
+0.1pp
10 to 14
-16
-0.3pp
15 to 19
-17
-0.5pp
20 to 24
-32
-1.0pp
25 to 29
+3
+2.2pp
30 to 34
-1
+1.7pp
35 to 39
-4
+0.8pp
40 to 44
-19
-0.4pp
45 to 49
-26
-0.8pp
50 to 54
-50
-2.4pp
55 to 59
-19
-0.3pp
60 to 64
-20
-0.5pp
65 to 69
+15
+1.8pp
70 to 74
+1
+0.6pp
75 to 79
-13
-0.6pp
80 to 84
+1
+0.3pp
85 and over
-6
-0.2pp
Data table
Five year age groups for Katherine. Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Katherine (T).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Katherine (T)% | Count | % | Katherine (T)% | Count | pp | |
| 0 to 4 | 59 | 4.7% | 7.3% | 95 | 6.4% | 8.2% | -36 | -1.7pp |
| 5 to 9 | 67 | 5.3% | 7.9% | 77 | 5.2% | 7.5% | -10 | +0.1pp |
| 10 to 14 | 67 | 5.3% | 7.3% | 83 | 5.6% | 7.1% | -16 | -0.3pp |
| 15 to 19 | 52 | 4.1% | 5.2% | 69 | 4.6% | 5.9% | -17 | -0.5pp |
| 20 to 24 | 92 | 7.3% | 6.9% | 124 | 8.3% | 6.6% | -32 | -1.0pp |
| 25 to 29 | 158 | 12.6% | 9.2% | 155 | 10.4% | 9.3% | +3 | +2.2pp |
| 30 to 34 | 139 | 11.1% | 10.0% | 140 | 9.4% | 8.9% | -1 | +1.7pp |
| 35 to 39 | 89 | 7.1% | 8.3% | 93 | 6.3% | 6.9% | -4 | +0.8pp |
| 40 to 44 | 65 | 5.2% | 6.2% | 84 | 5.6% | 6.1% | -19 | -0.4pp |
| 45 to 49 | 79 | 6.3% | 5.7% | 105 | 7.1% | 7.5% | -26 | -0.8pp |
| 50 to 54 | 75 | 6.0% | 6.5% | 125 | 8.4% | 6.9% | -50 | -2.4pp |
| 55 to 59 | 79 | 6.3% | 5.5% | 98 | 6.6% | 5.7% | -19 | -0.3pp |
| 60 to 64 | 73 | 5.8% | 5.1% | 93 | 6.3% | 5.1% | -20 | -0.5pp |
| 65 to 69 | 67 | 5.3% | 3.7% | 52 | 3.5% | 3.5% | +15 | +1.8pp |
| 70 to 74 | 45 | 3.6% | 2.5% | 44 | 3.0% | 2.4% | +1 | +0.6pp |
| 75 to 79 | 20 | 1.6% | 1.5% | 33 | 2.2% | 1.6% | -13 | -0.6pp |
| 80 to 84 | 12 | 1.0% | 0.8% | 11 | 0.7% | 0.5% | +1 | +0.3pp |
| 85 and over | 18 | 1.4% | 0.5% | 24 | 1.6% | 0.5% | -6 | -0.2pp |
| Total | 1,254 | 100.0% | 100.0% | 1,488 | 100.0% | 100.0% | -234 | 0.0pp |