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 Christies Beach, accounting for 8.2% (490 people). This share was higher than Onkaparinga (C) (6.3%). Since 2016, the biggest change was in 30 to 34 year olds, which increased by 159 people and 2 percentage points.
Section overview
Age structure - Five year age groups
Christies Beach - Total persons (Usual residence)
This table summarises five year age groups for Christies Beach in 2021 for persons, with comparison against Onkaparinga (C) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Christies Beach, with comparison markers for Onkaparinga (C).
0 to 4
2021 count
351
% of total
5.9%
Change from 2016
-0.1pp
351
5.9%
-0.1pp
5 to 9
2021 count
296
% of total
5.0%
Change from 2016
-0.7pp
296
5.0%
-0.7pp
10 to 14
2021 count
308
% of total
5.2%
Change from 2016
-0.4pp
308
5.2%
-0.4pp
15 to 19
2021 count
304
% of total
5.1%
Change from 2016
-0.5pp
304
5.1%
-0.5pp
20 to 24
2021 count
396
% of total
6.6%
Change from 2016
-1.1pp
396
6.6%
-1.1pp
25 to 29
2021 count
470
% of total
7.9%
Change from 2016
+1.0pp
470
7.9%
+1.0pp
30 to 34
2021 count
490
% of total
8.2%
Change from 2016
+2.0pp
490
8.2%
+2.0pp
35 to 39
2021 count
407
% of total
6.8%
Change from 2016
+0.8pp
407
6.8%
+0.8pp
40 to 44
2021 count
356
% of total
6.0%
Change from 2016
+0.5pp
356
6.0%
+0.5pp
45 to 49
2021 count
348
% of total
5.8%
Change from 2016
-0.9pp
348
5.8%
-0.9pp
50 to 54
2021 count
399
% of total
6.7%
Change from 2016
+0.4pp
399
6.7%
+0.4pp
55 to 59
2021 count
384
% of total
6.4%
Change from 2016
+0.2pp
384
6.4%
+0.2pp
60 to 64
2021 count
342
% of total
5.7%
Change from 2016
+0.2pp
342
5.7%
+0.2pp
65 to 69
2021 count
296
% of total
5.0%
Change from 2016
-0.7pp
296
5.0%
-0.7pp
70 to 74
2021 count
308
% of total
5.2%
Change from 2016
+1.0pp
308
5.2%
+1.0pp
75 to 79
2021 count
200
% of total
3.4%
Change from 2016
-0.2pp
200
3.4%
-0.2pp
80 to 84
2021 count
151
% of total
2.5%
Change from 2016
-1.0pp
151
2.5%
-1.0pp
85 and over
2021 count
181
% of total
3.0%
Change from 2016
-0.6pp
181
3.0%
-0.6pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
+27
-0.1pp
5 to 9
-13
-0.7pp
10 to 14
+6
-0.4pp
15 to 19
+4
-0.5pp
20 to 24
-18
-1.1pp
25 to 29
+97
+1.0pp
30 to 34
+159
+2.0pp
35 to 39
+82
+0.8pp
40 to 44
+61
+0.5pp
45 to 49
-15
-0.9pp
50 to 54
+60
+0.4pp
55 to 59
+50
+0.2pp
60 to 64
+47
+0.2pp
65 to 69
-9
-0.7pp
70 to 74
+81
+1.0pp
75 to 79
+5
-0.2pp
80 to 84
-39
-1.0pp
85 and over
-12
-0.6pp
Data table
Five year age groups for Christies Beach. Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Onkaparinga (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Onkaparinga (C)% | Count | % | Onkaparinga (C)% | Count | pp | |
| 0 to 4 | 351 | 5.9% | 5.4% | 324 | 6.0% | 6.2% | +27 | -0.1pp |
| 5 to 9 | 296 | 5.0% | 6.2% | 309 | 5.7% | 6.4% | -13 | -0.7pp |
| 10 to 14 | 308 | 5.2% | 6.2% | 302 | 5.6% | 6.1% | +6 | -0.4pp |
| 15 to 19 | 304 | 5.1% | 5.8% | 300 | 5.6% | 6.2% | +4 | -0.5pp |
| 20 to 24 | 396 | 6.6% | 5.6% | 414 | 7.7% | 6.0% | -18 | -1.1pp |
| 25 to 29 | 470 | 7.9% | 6.0% | 373 | 6.9% | 5.9% | +97 | +1.0pp |
| 30 to 34 | 490 | 8.2% | 6.3% | 331 | 6.2% | 6.5% | +159 | +2.0pp |
| 35 to 39 | 407 | 6.8% | 6.7% | 325 | 6.0% | 6.3% | +82 | +0.8pp |
| 40 to 44 | 356 | 6.0% | 6.1% | 295 | 5.5% | 6.6% | +61 | +0.5pp |
| 45 to 49 | 348 | 5.8% | 6.4% | 363 | 6.7% | 6.9% | -15 | -0.9pp |
| 50 to 54 | 399 | 6.7% | 6.6% | 339 | 6.3% | 6.7% | +60 | +0.4pp |
| 55 to 59 | 384 | 6.4% | 6.5% | 334 | 6.2% | 6.6% | +50 | +0.2pp |
| 60 to 64 | 342 | 5.7% | 6.3% | 295 | 5.5% | 6.3% | +47 | +0.2pp |
| 65 to 69 | 296 | 5.0% | 5.9% | 305 | 5.7% | 6.1% | -9 | -0.7pp |
| 70 to 74 | 308 | 5.2% | 5.7% | 227 | 4.2% | 4.3% | +81 | +1.0pp |
| 75 to 79 | 200 | 3.4% | 3.8% | 195 | 3.6% | 2.8% | +5 | -0.2pp |
| 80 to 84 | 151 | 2.5% | 2.3% | 190 | 3.5% | 2.0% | -39 | -1.0pp |
| 85 and over | 181 | 3.0% | 2.2% | 193 | 3.6% | 2.1% | -12 | -0.6pp |
| Total | 5,962 | 100.0% | 100.0% | 5,384 | 100.0% | 100.0% | +578 | 0.0pp |