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, 65 to 69 year olds was the largest age group among residents in Bulahdelah, accounting for 9.5% (146 people). This share was higher than Mid-Coast (A) (9.1%). Since 2016, the biggest change was in 70 to 74 year olds, which increased by 43 people and 2.3 percentage points.
Section overview
Age structure - Five year age groups
Bulahdelah - Total persons (Usual residence)
This table summarises five year age groups for Bulahdelah in 2021 for persons, with comparison against Mid-Coast (A) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Bulahdelah, with comparison markers for Mid-Coast (A).
0 to 4
2021 count
38
% of total
2.5%
Change from 2016
-1.4pp
38
2.5%
-1.4pp
5 to 9
2021 count
95
% of total
6.2%
Change from 2016
+1.5pp
95
6.2%
+1.5pp
10 to 14
2021 count
98
% of total
6.4%
Change from 2016
+2.0pp
98
6.4%
+2.0pp
15 to 19
2021 count
80
% of total
5.2%
Change from 2016
-0.1pp
80
5.2%
-0.1pp
20 to 24
2021 count
58
% of total
3.8%
Change from 2016
+0.4pp
58
3.8%
+0.4pp
25 to 29
2021 count
28
% of total
1.8%
Change from 2016
-3.2pp
28
1.8%
-3.2pp
30 to 34
2021 count
55
% of total
3.6%
Change from 2016
+0.7pp
55
3.6%
+0.7pp
35 to 39
2021 count
52
% of total
3.4%
Change from 2016
-0.9pp
52
3.4%
-0.9pp
40 to 44
2021 count
73
% of total
4.7%
Change from 2016
+0.7pp
73
4.7%
+0.7pp
45 to 49
2021 count
78
% of total
5.1%
Change from 2016
-2.4pp
78
5.1%
-2.4pp
50 to 54
2021 count
112
% of total
7.3%
Change from 2016
-0.6pp
112
7.3%
-0.6pp
55 to 59
2021 count
128
% of total
8.3%
Change from 2016
-1.2pp
128
8.3%
-1.2pp
60 to 64
2021 count
144
% of total
9.4%
Change from 2016
+0.8pp
144
9.4%
+0.8pp
65 to 69
2021 count
146
% of total
9.5%
Change from 2016
-1.1pp
146
9.5%
-1.1pp
70 to 74
2021 count
139
% of total
9.0%
Change from 2016
+2.3pp
139
9.0%
+2.3pp
75 to 79
2021 count
84
% of total
5.5%
Change from 2016
0.0pp
84
5.5%
0.0pp
80 to 84
2021 count
56
% of total
3.6%
Change from 2016
+0.3pp
56
3.6%
+0.3pp
85 and over
2021 count
59
% of total
3.8%
Change from 2016
-0.6pp
59
3.8%
-0.6pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-18
-1.4pp
5 to 9
+28
+1.5pp
10 to 14
+36
+2.0pp
15 to 19
+4
-0.1pp
20 to 24
+10
+0.4pp
25 to 29
-43
-3.2pp
30 to 34
+13
+0.7pp
35 to 39
-9
-0.9pp
40 to 44
+16
+0.7pp
45 to 49
-29
-2.4pp
50 to 54
-1
-0.6pp
55 to 59
-7
-1.2pp
60 to 64
+21
+0.8pp
65 to 69
-5
-1.1pp
70 to 74
+43
+2.3pp
75 to 79
+5
0.0pp
80 to 84
+9
+0.3pp
85 and over
-4
-0.6pp
Data table
Five year age groups for Bulahdelah. Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Mid-Coast (A).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Mid-Coast (A)% | Count | % | Mid-Coast (A)% | Count | pp | |
| 0 to 4 | 38 | 2.5% | 4.1% | 56 | 3.9% | 4.6% | -18 | -1.4pp |
| 5 to 9 | 95 | 6.2% | 4.9% | 67 | 4.7% | 5.4% | +28 | +1.5pp |
| 10 to 14 | 98 | 6.4% | 5.6% | 62 | 4.4% | 5.4% | +36 | +2.0pp |
| 15 to 19 | 80 | 5.2% | 4.8% | 76 | 5.3% | 5.3% | +4 | -0.1pp |
| 20 to 24 | 58 | 3.8% | 3.6% | 48 | 3.4% | 3.8% | +10 | +0.4pp |
| 25 to 29 | 28 | 1.8% | 3.8% | 71 | 5.0% | 3.7% | -43 | -3.2pp |
| 30 to 34 | 55 | 3.6% | 4.1% | 42 | 2.9% | 3.8% | +13 | +0.7pp |
| 35 to 39 | 52 | 3.4% | 4.3% | 61 | 4.3% | 4.1% | -9 | -0.9pp |
| 40 to 44 | 73 | 4.7% | 4.4% | 57 | 4.0% | 5.1% | +16 | +0.7pp |
| 45 to 49 | 78 | 5.1% | 5.3% | 107 | 7.5% | 5.8% | -29 | -2.4pp |
| 50 to 54 | 112 | 7.3% | 6.0% | 113 | 7.9% | 6.7% | -1 | -0.6pp |
| 55 to 59 | 128 | 8.3% | 7.2% | 135 | 9.5% | 7.8% | -7 | -1.2pp |
| 60 to 64 | 144 | 9.4% | 8.8% | 123 | 8.6% | 8.4% | +21 | +0.8pp |
| 65 to 69 | 146 | 9.5% | 9.1% | 151 | 10.6% | 9.3% | -5 | -1.1pp |
| 70 to 74 | 139 | 9.0% | 9.2% | 96 | 6.7% | 7.7% | +43 | +2.3pp |
| 75 to 79 | 84 | 5.5% | 6.7% | 79 | 5.5% | 5.5% | +5 | 0.0pp |
| 80 to 84 | 56 | 3.6% | 4.2% | 47 | 3.3% | 3.7% | +9 | +0.3pp |
| 85 and over | 59 | 3.8% | 4.0% | 63 | 4.4% | 3.8% | -4 | -0.6pp |
| Total | 1,538 | 100.0% | 100.0% | 1,424 | 100.0% | 100.0% | +114 | 0.0pp |