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, 30 to 34 year olds was the largest age group among residents in Byron Bay, accounting for 11.5% (729 people). This share was higher than Byron (A) (7.6%). Since 2016, the biggest change was in 30 to 34 year olds, which increased by 303 people and 3.8 percentage points.
Section overview
Age structure - Five year age groups
Byron Bay - Total persons (Usual residence)
This table summarises five year age groups for Byron Bay in 2021 for persons, with comparison against Byron (A) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Byron Bay, with comparison markers for Byron (A).
0 to 4
2021 count
234
% of total
3.7%
Change from 2016
-0.3pp
234
3.7%
-0.3pp
5 to 9
2021 count
235
% of total
3.7%
Change from 2016
-0.4pp
235
3.7%
-0.4pp
10 to 14
2021 count
266
% of total
4.2%
Change from 2016
+0.3pp
266
4.2%
+0.3pp
15 to 19
2021 count
232
% of total
3.7%
Change from 2016
-0.5pp
232
3.7%
-0.5pp
20 to 24
2021 count
366
% of total
5.8%
Change from 2016
-0.1pp
366
5.8%
-0.1pp
25 to 29
2021 count
636
% of total
10.0%
Change from 2016
+0.3pp
636
10.0%
+0.3pp
30 to 34
2021 count
729
% of total
11.5%
Change from 2016
+3.8pp
729
11.5%
+3.8pp
35 to 39
2021 count
537
% of total
8.5%
Change from 2016
+1.8pp
537
8.5%
+1.8pp
40 to 44
2021 count
420
% of total
6.6%
Change from 2016
+0.1pp
420
6.6%
+0.1pp
45 to 49
2021 count
393
% of total
6.2%
Change from 2016
0.0pp
393
6.2%
0.0pp
50 to 54
2021 count
347
% of total
5.5%
Change from 2016
-1.5pp
347
5.5%
-1.5pp
55 to 59
2021 count
373
% of total
5.9%
Change from 2016
-2.5pp
373
5.9%
-2.5pp
60 to 64
2021 count
451
% of total
7.1%
Change from 2016
-1.4pp
451
7.1%
-1.4pp
65 to 69
2021 count
424
% of total
6.7%
Change from 2016
+0.1pp
424
6.7%
+0.1pp
70 to 74
2021 count
328
% of total
5.2%
Change from 2016
+1.1pp
328
5.2%
+1.1pp
75 to 79
2021 count
203
% of total
3.2%
Change from 2016
+0.9pp
203
3.2%
+0.9pp
80 to 84
2021 count
104
% of total
1.6%
Change from 2016
+0.3pp
104
1.6%
+0.3pp
85 and over
2021 count
92
% of total
1.5%
Change from 2016
-1.3pp
92
1.5%
-1.3pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
+11
-0.3pp
5 to 9
+10
-0.4pp
10 to 14
+50
+0.3pp
15 to 19
0
-0.5pp
20 to 24
+43
-0.1pp
25 to 29
+100
+0.3pp
30 to 34
+303
+3.8pp
35 to 39
+166
+1.8pp
40 to 44
+59
+0.1pp
45 to 49
+50
0.0pp
50 to 54
-38
-1.5pp
55 to 59
-92
-2.5pp
60 to 64
-20
-1.4pp
65 to 69
+62
+0.1pp
70 to 74
+99
+1.1pp
75 to 79
+74
+0.9pp
80 to 84
+33
+0.3pp
85 and over
-62
-1.3pp
Data table
Five year age groups for Byron Bay. Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Byron (A).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Byron (A)% | Count | % | Byron (A)% | Count | pp | |
| 0 to 4 | 234 | 3.7% | 4.8% | 223 | 4.0% | 4.9% | +11 | -0.3pp |
| 5 to 9 | 235 | 3.7% | 5.5% | 225 | 4.1% | 5.9% | +10 | -0.4pp |
| 10 to 14 | 266 | 4.2% | 5.8% | 216 | 3.9% | 6.0% | +50 | +0.3pp |
| 15 to 19 | 232 | 3.7% | 4.7% | 232 | 4.2% | 5.1% | 0 | -0.5pp |
| 20 to 24 | 366 | 5.8% | 4.1% | 323 | 5.9% | 3.8% | +43 | -0.1pp |
| 25 to 29 | 636 | 10.0% | 5.9% | 536 | 9.7% | 5.2% | +100 | +0.3pp |
| 30 to 34 | 729 | 11.5% | 7.6% | 426 | 7.7% | 5.5% | +303 | +3.8pp |
| 35 to 39 | 537 | 8.5% | 7.3% | 371 | 6.7% | 6.3% | +166 | +1.8pp |
| 40 to 44 | 420 | 6.6% | 6.9% | 361 | 6.5% | 7.6% | +59 | +0.1pp |
| 45 to 49 | 393 | 6.2% | 7.5% | 343 | 6.2% | 7.6% | +50 | 0.0pp |
| 50 to 54 | 347 | 5.5% | 6.9% | 385 | 7.0% | 7.9% | -38 | -1.5pp |
| 55 to 59 | 373 | 5.9% | 6.9% | 465 | 8.4% | 8.7% | -92 | -2.5pp |
| 60 to 64 | 451 | 7.1% | 7.5% | 471 | 8.5% | 8.7% | -20 | -1.4pp |
| 65 to 69 | 424 | 6.7% | 7.1% | 362 | 6.6% | 6.6% | +62 | +0.1pp |
| 70 to 74 | 328 | 5.2% | 5.3% | 229 | 4.1% | 4.0% | +99 | +1.1pp |
| 75 to 79 | 203 | 3.2% | 2.9% | 129 | 2.3% | 2.4% | +74 | +0.9pp |
| 80 to 84 | 104 | 1.6% | 1.6% | 71 | 1.3% | 1.6% | +33 | +0.3pp |
| 85 and over | 92 | 1.5% | 1.6% | 154 | 2.8% | 2.2% | -62 | -1.3pp |
| Total | 6,330 | 100.0% | 100.0% | 5,521 | 100.0% | 100.0% | +809 | 0.0pp |