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, 5 to 9 year olds was the largest age group among residents in Baynton (WA), accounting for 11.4% (512 people). This share was higher than Karratha (C) (9.2%). Since 2016, the biggest change was in 10 to 14 year olds, which increased by 121 people and 2.3 percentage points.
Section overview
Age structure - Five year age groups
Baynton (WA) - Total persons (Usual residence)
This table summarises five year age groups for Baynton (WA) in 2021 for persons, with comparison against Karratha (C) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Baynton (WA), with comparison markers for Karratha (C).
0 to 4
2021 count
428
% of total
9.5%
Change from 2016
-2.6pp
428
9.5%
-2.6pp
5 to 9
2021 count
512
% of total
11.4%
Change from 2016
+0.6pp
512
11.4%
+0.6pp
10 to 14
2021 count
429
% of total
9.5%
Change from 2016
+2.3pp
429
9.5%
+2.3pp
15 to 19
2021 count
293
% of total
6.5%
Change from 2016
+1.2pp
293
6.5%
+1.2pp
20 to 24
2021 count
170
% of total
3.8%
Change from 2016
-1.6pp
170
3.8%
-1.6pp
25 to 29
2021 count
289
% of total
6.4%
Change from 2016
-2.8pp
289
6.4%
-2.8pp
30 to 34
2021 count
469
% of total
10.4%
Change from 2016
-1.5pp
469
10.4%
-1.5pp
35 to 39
2021 count
511
% of total
11.4%
Change from 2016
+1.1pp
511
11.4%
+1.1pp
40 to 44
2021 count
403
% of total
9.0%
Change from 2016
-0.2pp
403
9.0%
-0.2pp
45 to 49
2021 count
378
% of total
8.4%
Change from 2016
+2.0pp
378
8.4%
+2.0pp
50 to 54
2021 count
264
% of total
5.9%
Change from 2016
+0.2pp
264
5.9%
+0.2pp
55 to 59
2021 count
163
% of total
3.6%
Change from 2016
+0.7pp
163
3.6%
+0.7pp
60 to 64
2021 count
97
% of total
2.2%
Change from 2016
+0.1pp
97
2.2%
+0.1pp
65 to 69
2021 count
50
% of total
1.1%
Change from 2016
+0.1pp
50
1.1%
+0.1pp
70 to 74
2021 count
13
% of total
0.3%
Change from 2016
+0.1pp
13
0.3%
+0.1pp
75 to 79
2021 count
0
% of total
0.0%
Change from 2016
-0.1pp
0
0.0%
-0.1pp
80 to 84
2021 count
0
% of total
0.0%
Change from 2016
0.0pp
0
0.0%
0.0pp
85 and over
2021 count
0
% of total
0.0%
Change from 2016
0.0pp
0
0.0%
0.0pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-92
-2.6pp
5 to 9
+49
+0.6pp
10 to 14
+121
+2.3pp
15 to 19
+63
+1.2pp
20 to 24
-63
-1.6pp
25 to 29
-106
-2.8pp
30 to 34
-45
-1.5pp
35 to 39
+69
+1.1pp
40 to 44
+5
-0.2pp
45 to 49
+102
+2.0pp
50 to 54
+17
+0.2pp
55 to 59
+38
+0.7pp
60 to 64
+5
+0.1pp
65 to 69
+8
+0.1pp
70 to 74
+5
+0.1pp
75 to 79
-6
-0.1pp
80 to 84
0
0.0pp
85 and over
0
0.0pp
Data table
Five year age groups for Baynton (WA). Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Karratha (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Karratha (C)% | Count | % | Karratha (C)% | Count | pp | |
| 0 to 4 | 428 | 9.5% | 8.5% | 520 | 12.1% | 9.5% | -92 | -2.6pp |
| 5 to 9 | 512 | 11.4% | 9.2% | 463 | 10.8% | 8.6% | +49 | +0.6pp |
| 10 to 14 | 429 | 9.5% | 7.7% | 308 | 7.2% | 6.6% | +121 | +2.3pp |
| 15 to 19 | 293 | 6.5% | 5.4% | 230 | 5.3% | 5.1% | +63 | +1.2pp |
| 20 to 24 | 170 | 3.8% | 5.3% | 233 | 5.4% | 6.2% | -63 | -1.6pp |
| 25 to 29 | 289 | 6.4% | 8.1% | 395 | 9.2% | 9.6% | -106 | -2.8pp |
| 30 to 34 | 469 | 10.4% | 10.4% | 514 | 11.9% | 11.7% | -45 | -1.5pp |
| 35 to 39 | 511 | 11.4% | 10.8% | 442 | 10.3% | 9.6% | +69 | +1.1pp |
| 40 to 44 | 403 | 9.0% | 8.7% | 398 | 9.2% | 9.0% | +5 | -0.2pp |
| 45 to 49 | 378 | 8.4% | 7.9% | 276 | 6.4% | 7.7% | +102 | +2.0pp |
| 50 to 54 | 264 | 5.9% | 6.3% | 247 | 5.7% | 6.3% | +17 | +0.2pp |
| 55 to 59 | 163 | 3.6% | 4.8% | 125 | 2.9% | 4.7% | +38 | +0.7pp |
| 60 to 64 | 97 | 2.2% | 3.6% | 92 | 2.1% | 2.9% | +5 | +0.1pp |
| 65 to 69 | 50 | 1.1% | 1.7% | 42 | 1.0% | 1.4% | +8 | +0.1pp |
| 70 to 74 | 13 | 0.3% | 0.9% | 8 | 0.2% | 0.6% | +5 | +0.1pp |
| 75 to 79 | 0 | 0.0% | 0.3% | 6 | 0.1% | 0.3% | -6 | -0.1pp |
| 80 to 84 | 0 | 0.0% | 0.3% | 0 | 0.0% | 0.1% | 0 | 0.0pp |
| 85 and over | 0 | 0.0% | 0.0% | 0 | 0.0% | 0.1% | 0 | 0.0pp |
| Total | 4,496 | 100.0% | 100.0% | 4,306 | 100.0% | 100.0% | +190 | 0.0pp |