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, 35 to 39 year olds was the largest age group among residents in Seacombe Heights, accounting for 7.7% (120 people). This share was higher than Marion (C) (7.5%). Since 2016, the biggest change was in 5 to 9 year olds, which increased by 33 people and 2 percentage points.
Section overview
Age structure - Five year age groups
Seacombe Heights - Total persons (Usual residence)
This table summarises five year age groups for Seacombe Heights in 2021 for persons, with comparison against Marion (C) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Seacombe Heights, with comparison markers for Marion (C).
0 to 4
2021 count
87
% of total
5.6%
Change from 2016
-1.4pp
87
5.6%
-1.4pp
5 to 9
2021 count
96
% of total
6.2%
Change from 2016
+2.0pp
96
6.2%
+2.0pp
10 to 14
2021 count
104
% of total
6.7%
Change from 2016
+0.5pp
104
6.7%
+0.5pp
15 to 19
2021 count
98
% of total
6.3%
Change from 2016
+0.4pp
98
6.3%
+0.4pp
20 to 24
2021 count
69
% of total
4.5%
Change from 2016
-1.4pp
69
4.5%
-1.4pp
25 to 29
2021 count
84
% of total
5.4%
Change from 2016
-0.5pp
84
5.4%
-0.5pp
30 to 34
2021 count
102
% of total
6.6%
Change from 2016
+0.9pp
102
6.6%
+0.9pp
35 to 39
2021 count
120
% of total
7.7%
Change from 2016
+0.4pp
120
7.7%
+0.4pp
40 to 44
2021 count
109
% of total
7.0%
Change from 2016
-0.1pp
109
7.0%
-0.1pp
45 to 49
2021 count
115
% of total
7.4%
Change from 2016
+0.9pp
115
7.4%
+0.9pp
50 to 54
2021 count
101
% of total
6.5%
Change from 2016
-0.8pp
101
6.5%
-0.8pp
55 to 59
2021 count
94
% of total
6.1%
Change from 2016
+0.5pp
94
6.1%
+0.5pp
60 to 64
2021 count
70
% of total
4.5%
Change from 2016
-0.8pp
70
4.5%
-0.8pp
65 to 69
2021 count
74
% of total
4.8%
Change from 2016
-1.1pp
74
4.8%
-1.1pp
70 to 74
2021 count
66
% of total
4.3%
Change from 2016
-1.5pp
66
4.3%
-1.5pp
75 to 79
2021 count
68
% of total
4.4%
Change from 2016
+0.6pp
68
4.4%
+0.6pp
80 to 84
2021 count
42
% of total
2.7%
Change from 2016
+0.5pp
42
2.7%
+0.5pp
85 and over
2021 count
26
% of total
1.7%
Change from 2016
-0.4pp
26
1.7%
-0.4pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-17
-1.4pp
5 to 9
+33
+2.0pp
10 to 14
+12
+0.5pp
15 to 19
+10
+0.4pp
20 to 24
-18
-1.4pp
25 to 29
-4
-0.5pp
30 to 34
+18
+0.9pp
35 to 39
+12
+0.4pp
40 to 44
+4
-0.1pp
45 to 49
+19
+0.9pp
50 to 54
-8
-0.8pp
55 to 59
+11
+0.5pp
60 to 64
-9
-0.8pp
65 to 69
-13
-1.1pp
70 to 74
-20
-1.5pp
75 to 79
+11
+0.6pp
80 to 84
+9
+0.5pp
85 and over
-5
-0.4pp
Data table
Five year age groups for Seacombe Heights. Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Marion (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Marion (C)% | Count | % | Marion (C)% | Count | pp | |
| 0 to 4 | 87 | 5.6% | 5.4% | 104 | 7.0% | 5.9% | -17 | -1.4pp |
| 5 to 9 | 96 | 6.2% | 5.6% | 63 | 4.2% | 5.4% | +33 | +2.0pp |
| 10 to 14 | 104 | 6.7% | 5.2% | 92 | 6.2% | 4.9% | +12 | +0.5pp |
| 15 to 19 | 98 | 6.3% | 5.1% | 88 | 5.9% | 5.7% | +10 | +0.4pp |
| 20 to 24 | 69 | 4.5% | 6.7% | 87 | 5.9% | 7.2% | -18 | -1.4pp |
| 25 to 29 | 84 | 5.4% | 7.4% | 88 | 5.9% | 7.3% | -4 | -0.5pp |
| 30 to 34 | 102 | 6.6% | 7.7% | 84 | 5.7% | 7.5% | +18 | +0.9pp |
| 35 to 39 | 120 | 7.7% | 7.5% | 108 | 7.3% | 6.8% | +12 | +0.4pp |
| 40 to 44 | 109 | 7.0% | 6.6% | 105 | 7.1% | 6.4% | +4 | -0.1pp |
| 45 to 49 | 115 | 7.4% | 6.1% | 96 | 6.5% | 6.3% | +19 | +0.9pp |
| 50 to 54 | 101 | 6.5% | 5.9% | 109 | 7.3% | 6.4% | -8 | -0.8pp |
| 55 to 59 | 94 | 6.1% | 5.9% | 83 | 5.6% | 6.6% | +11 | +0.5pp |
| 60 to 64 | 70 | 4.5% | 6.1% | 79 | 5.3% | 6.2% | -9 | -0.8pp |
| 65 to 69 | 74 | 4.8% | 5.7% | 87 | 5.9% | 5.2% | -13 | -1.1pp |
| 70 to 74 | 66 | 4.3% | 4.8% | 86 | 5.8% | 3.7% | -20 | -1.5pp |
| 75 to 79 | 68 | 4.4% | 3.3% | 57 | 3.8% | 2.9% | +11 | +0.6pp |
| 80 to 84 | 42 | 2.7% | 2.3% | 33 | 2.2% | 2.4% | +9 | +0.5pp |
| 85 and over | 26 | 1.7% | 2.9% | 31 | 2.1% | 3.1% | -5 | -0.4pp |
| Total | 1,549 | 100.0% | 100.0% | 1,486 | 100.0% | 100.0% | +63 | 0.0pp |