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, 50 to 54 year olds was the largest age group among residents in Blakehurst, accounting for 7.4% (495 people). This share was higher than Georges River (A) (6.2%). Since 2016, the biggest change was in 70 to 74 year olds, which increased by 116 people and 1.5 percentage points.
Section overview
Age structure - Five year age groups
Blakehurst - Total persons (Usual residence)
This table summarises five year age groups for Blakehurst in 2021 for persons, with comparison against Georges River (A) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Blakehurst, with comparison markers for Georges River (A).
0 to 4
2021 count
280
% of total
4.2%
Change from 2016
-1.2pp
280
4.2%
-1.2pp
5 to 9
2021 count
426
% of total
6.4%
Change from 2016
-0.1pp
426
6.4%
-0.1pp
10 to 14
2021 count
470
% of total
7.1%
Change from 2016
+0.1pp
470
7.1%
+0.1pp
15 to 19
2021 count
448
% of total
6.7%
Change from 2016
-1.1pp
448
6.7%
-1.1pp
20 to 24
2021 count
469
% of total
7.1%
Change from 2016
+0.4pp
469
7.1%
+0.4pp
25 to 29
2021 count
333
% of total
5.0%
Change from 2016
+0.1pp
333
5.0%
+0.1pp
30 to 34
2021 count
283
% of total
4.3%
Change from 2016
+0.3pp
283
4.3%
+0.3pp
35 to 39
2021 count
351
% of total
5.3%
Change from 2016
-0.4pp
351
5.3%
-0.4pp
40 to 44
2021 count
419
% of total
6.3%
Change from 2016
0.0pp
419
6.3%
0.0pp
45 to 49
2021 count
421
% of total
6.3%
Change from 2016
-0.9pp
421
6.3%
-0.9pp
50 to 54
2021 count
495
% of total
7.4%
Change from 2016
-0.1pp
495
7.4%
-0.1pp
55 to 59
2021 count
493
% of total
7.4%
Change from 2016
+0.5pp
493
7.4%
+0.5pp
60 to 64
2021 count
404
% of total
6.1%
Change from 2016
+0.6pp
404
6.1%
+0.6pp
65 to 69
2021 count
337
% of total
5.1%
Change from 2016
-0.8pp
337
5.1%
-0.8pp
70 to 74
2021 count
342
% of total
5.1%
Change from 2016
+1.5pp
342
5.1%
+1.5pp
75 to 79
2021 count
218
% of total
3.3%
Change from 2016
+0.4pp
218
3.3%
+0.4pp
80 to 84
2021 count
171
% of total
2.6%
Change from 2016
+0.3pp
171
2.6%
+0.3pp
85 and over
2021 count
282
% of total
4.2%
Change from 2016
+0.4pp
282
4.2%
+0.4pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-53
-1.2pp
5 to 9
+23
-0.1pp
10 to 14
+36
+0.1pp
15 to 19
-37
-1.1pp
20 to 24
+50
+0.4pp
25 to 29
+28
+0.1pp
30 to 34
+34
+0.3pp
35 to 39
-5
-0.4pp
40 to 44
+29
0.0pp
45 to 49
-27
-0.9pp
50 to 54
+30
-0.1pp
55 to 59
+61
+0.5pp
60 to 64
+59
+0.6pp
65 to 69
-30
-0.8pp
70 to 74
+116
+1.5pp
75 to 79
+39
+0.4pp
80 to 84
+31
+0.3pp
85 and over
+44
+0.4pp
Data table
Five year age groups for Blakehurst. Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Georges River (A).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Georges River (A)% | Count | % | Georges River (A)% | Count | pp | |
| 0 to 4 | 280 | 4.2% | 5.0% | 333 | 5.4% | 5.8% | -53 | -1.2pp |
| 5 to 9 | 426 | 6.4% | 5.5% | 403 | 6.5% | 5.6% | +23 | -0.1pp |
| 10 to 14 | 470 | 7.1% | 5.4% | 434 | 7.0% | 5.3% | +36 | +0.1pp |
| 15 to 19 | 448 | 6.7% | 5.3% | 485 | 7.8% | 6.1% | -37 | -1.1pp |
| 20 to 24 | 469 | 7.1% | 7.6% | 419 | 6.7% | 7.6% | +50 | +0.4pp |
| 25 to 29 | 333 | 5.0% | 8.0% | 305 | 4.9% | 8.7% | +28 | +0.1pp |
| 30 to 34 | 283 | 4.3% | 7.5% | 249 | 4.0% | 7.9% | +34 | +0.3pp |
| 35 to 39 | 351 | 5.3% | 7.2% | 356 | 5.7% | 6.6% | -5 | -0.4pp |
| 40 to 44 | 419 | 6.3% | 6.3% | 390 | 6.3% | 6.5% | +29 | 0.0pp |
| 45 to 49 | 421 | 6.3% | 6.3% | 448 | 7.2% | 6.5% | -27 | -0.9pp |
| 50 to 54 | 495 | 7.4% | 6.2% | 465 | 7.5% | 6.6% | +30 | -0.1pp |
| 55 to 59 | 493 | 7.4% | 6.3% | 432 | 6.9% | 6.1% | +61 | +0.5pp |
| 60 to 64 | 404 | 6.1% | 5.9% | 345 | 5.5% | 5.2% | +59 | +0.6pp |
| 65 to 69 | 337 | 5.1% | 4.9% | 367 | 5.9% | 4.5% | -30 | -0.8pp |
| 70 to 74 | 342 | 5.1% | 4.2% | 226 | 3.6% | 3.4% | +116 | +1.5pp |
| 75 to 79 | 218 | 3.3% | 3.1% | 179 | 2.9% | 2.7% | +39 | +0.4pp |
| 80 to 84 | 171 | 2.6% | 2.3% | 140 | 2.3% | 2.2% | +31 | +0.3pp |
| 85 and over | 282 | 4.2% | 2.8% | 238 | 3.8% | 2.6% | +44 | +0.4pp |
| Total | 6,652 | 100.0% | 100.0% | 6,219 | 100.0% | 100.0% | +433 | 0.0pp |