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, 25 to 29 year olds was the largest age group among residents in Hillbank, accounting for 8.2% (411 people). This share was similar to Playford (C) (8.2%). Since 2016, the biggest change was in 25 to 29 year olds, which increased by 378 people, while its share fell by 6.1 percentage points.
Section overview
Age structure - Five year age groups
Hillbank - Total persons (Usual residence)
This table summarises five year age groups for Hillbank in 2021 for persons, with comparison against Playford (C) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Hillbank, with comparison markers for Playford (C).
0 to 4
2021 count
344
% of total
6.9%
Change from 2016
+3.0pp
344
6.9%
+3.0pp
5 to 9
2021 count
323
% of total
6.4%
Change from 2016
+5.1pp
323
6.4%
+5.1pp
10 to 14
2021 count
277
% of total
5.5%
Change from 2016
+5.5pp
277
5.5%
+5.5pp
15 to 19
2021 count
292
% of total
5.8%
Change from 2016
+5.8pp
292
5.8%
+5.8pp
20 to 24
2021 count
383
% of total
7.6%
Change from 2016
-4.5pp
383
7.6%
-4.5pp
25 to 29
2021 count
411
% of total
8.2%
Change from 2016
-6.1pp
411
8.2%
-6.1pp
30 to 34
2021 count
351
% of total
7.0%
Change from 2016
-6.4pp
351
7.0%
-6.4pp
35 to 39
2021 count
341
% of total
6.8%
Change from 2016
+2.0pp
341
6.8%
+2.0pp
40 to 44
2021 count
260
% of total
5.2%
Change from 2016
+2.6pp
260
5.2%
+2.6pp
45 to 49
2021 count
313
% of total
6.2%
Change from 2016
-6.8pp
313
6.2%
-6.8pp
50 to 54
2021 count
360
% of total
7.2%
Change from 2016
+1.6pp
360
7.2%
+1.6pp
55 to 59
2021 count
366
% of total
7.3%
Change from 2016
-0.1pp
366
7.3%
-0.1pp
60 to 64
2021 count
344
% of total
6.9%
Change from 2016
-0.5pp
344
6.9%
-0.5pp
65 to 69
2021 count
239
% of total
4.8%
Change from 2016
+3.5pp
239
4.8%
+3.5pp
70 to 74
2021 count
206
% of total
4.1%
Change from 2016
+4.1pp
206
4.1%
+4.1pp
75 to 79
2021 count
98
% of total
2.0%
Change from 2016
+2.0pp
98
2.0%
+2.0pp
80 to 84
2021 count
82
% of total
1.6%
Change from 2016
+0.3pp
82
1.6%
+0.3pp
85 and over
2021 count
39
% of total
0.8%
Change from 2016
-0.5pp
39
0.8%
-0.5pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
+335
+3.0pp
5 to 9
+320
+5.1pp
10 to 14
+277
+5.5pp
15 to 19
+292
+5.8pp
20 to 24
+355
-4.5pp
25 to 29
+378
-6.1pp
30 to 34
+320
-6.4pp
35 to 39
+330
+2.0pp
40 to 44
+254
+2.6pp
45 to 49
+283
-6.8pp
50 to 54
+347
+1.6pp
55 to 59
+349
-0.1pp
60 to 64
+327
-0.5pp
65 to 69
+236
+3.5pp
70 to 74
+206
+4.1pp
75 to 79
+98
+2.0pp
80 to 84
+79
+0.3pp
85 and over
+36
-0.5pp
Data table
Five year age groups for Hillbank. Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Playford (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Playford (C)% | Count | % | Playford (C)% | Count | pp | |
| 0 to 4 | 344 | 6.9% | 7.5% | 9 | 3.9% | 8.6% | +335 | +3.0pp |
| 5 to 9 | 323 | 6.4% | 8.0% | 3 | 1.3% | 7.9% | +320 | +5.1pp |
| 10 to 14 | 277 | 5.5% | 7.4% | 0 | 0.0% | 6.6% | +277 | +5.5pp |
| 15 to 19 | 292 | 5.8% | 6.2% | 0 | 0.0% | 6.7% | +292 | +5.8pp |
| 20 to 24 | 383 | 7.6% | 7.0% | 28 | 12.1% | 7.7% | +355 | -4.5pp |
| 25 to 29 | 411 | 8.2% | 8.2% | 33 | 14.3% | 7.9% | +378 | -6.1pp |
| 30 to 34 | 351 | 7.0% | 7.7% | 31 | 13.4% | 7.4% | +320 | -6.4pp |
| 35 to 39 | 341 | 6.8% | 7.1% | 11 | 4.8% | 6.1% | +330 | +2.0pp |
| 40 to 44 | 260 | 5.2% | 5.7% | 6 | 2.6% | 5.9% | +254 | +2.6pp |
| 45 to 49 | 313 | 6.2% | 5.7% | 30 | 13.0% | 6.2% | +283 | -6.8pp |
| 50 to 54 | 360 | 7.2% | 5.7% | 13 | 5.6% | 6.5% | +347 | +1.6pp |
| 55 to 59 | 366 | 7.3% | 5.8% | 17 | 7.4% | 5.8% | +349 | -0.1pp |
| 60 to 64 | 344 | 6.9% | 5.1% | 17 | 7.4% | 4.5% | +327 | -0.5pp |
| 65 to 69 | 239 | 4.8% | 4.0% | 3 | 1.3% | 3.9% | +236 | +3.5pp |
| 70 to 74 | 206 | 4.1% | 3.3% | 0 | 0.0% | 2.8% | +206 | +4.1pp |
| 75 to 79 | 98 | 2.0% | 2.2% | 0 | 0.0% | 2.3% | +98 | +2.0pp |
| 80 to 84 | 82 | 1.6% | 1.7% | 3 | 1.3% | 1.7% | +79 | +0.3pp |
| 85 and over | 39 | 0.8% | 1.6% | 3 | 1.3% | 1.5% | +36 | -0.5pp |
| Total | 5,013 | 100.0% | 100.0% | 231 | 100.0% | 100.0% | +4,782 | 0.0pp |