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, 70 to 74 year olds was the largest age group among residents in Christie Downs, accounting for 6.8% (355 people). This share was higher than Onkaparinga (C) (5.7%). Since 2016, the biggest change was in 70 to 74 year olds, which increased by 113 people and 2.2 percentage points.
Section overview
Age structure - Five year age groups
Christie Downs - Total persons (Usual residence)
This table summarises five year age groups for Christie Downs 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 Christie Downs, with comparison markers for Onkaparinga (C).
0 to 4
2021 count
256
% of total
4.9%
Change from 2016
-1.8pp
256
4.9%
-1.8pp
5 to 9
2021 count
316
% of total
6.0%
Change from 2016
-0.2pp
316
6.0%
-0.2pp
10 to 14
2021 count
324
% of total
6.2%
Change from 2016
+0.7pp
324
6.2%
+0.7pp
15 to 19
2021 count
299
% of total
5.7%
Change from 2016
-0.8pp
299
5.7%
-0.8pp
20 to 24
2021 count
311
% of total
5.9%
Change from 2016
-0.3pp
311
5.9%
-0.3pp
25 to 29
2021 count
335
% of total
6.4%
Change from 2016
+0.5pp
335
6.4%
+0.5pp
30 to 34
2021 count
315
% of total
6.0%
Change from 2016
-0.8pp
315
6.0%
-0.8pp
35 to 39
2021 count
352
% of total
6.7%
Change from 2016
+0.3pp
352
6.7%
+0.3pp
40 to 44
2021 count
340
% of total
6.5%
Change from 2016
+0.7pp
340
6.5%
+0.7pp
45 to 49
2021 count
323
% of total
6.2%
Change from 2016
+0.1pp
323
6.2%
+0.1pp
50 to 54
2021 count
313
% of total
6.0%
Change from 2016
+0.3pp
313
6.0%
+0.3pp
55 to 59
2021 count
319
% of total
6.1%
Change from 2016
+1.2pp
319
6.1%
+1.2pp
60 to 64
2021 count
270
% of total
5.2%
Change from 2016
-1.1pp
270
5.2%
-1.1pp
65 to 69
2021 count
307
% of total
5.9%
Change from 2016
-1.5pp
307
5.9%
-1.5pp
70 to 74
2021 count
355
% of total
6.8%
Change from 2016
+2.2pp
355
6.8%
+2.2pp
75 to 79
2021 count
199
% of total
3.8%
Change from 2016
+0.3pp
199
3.8%
+0.3pp
80 to 84
2021 count
156
% of total
3.0%
Change from 2016
+0.4pp
156
3.0%
+0.4pp
85 and over
2021 count
145
% of total
2.8%
Change from 2016
+0.1pp
145
2.8%
+0.1pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-100
-1.8pp
5 to 9
-10
-0.2pp
10 to 14
+34
+0.7pp
15 to 19
-45
-0.8pp
20 to 24
-15
-0.3pp
25 to 29
+25
+0.5pp
30 to 34
-45
-0.8pp
35 to 39
+13
+0.3pp
40 to 44
+32
+0.7pp
45 to 49
+2
+0.1pp
50 to 54
+9
+0.3pp
55 to 59
+58
+1.2pp
60 to 64
-64
-1.1pp
65 to 69
-83
-1.5pp
70 to 74
+113
+2.2pp
75 to 79
+13
+0.3pp
80 to 84
+16
+0.4pp
85 and over
+2
+0.1pp
Data table
Five year age groups for Christie Downs. 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 | 256 | 4.9% | 5.4% | 356 | 6.7% | 6.2% | -100 | -1.8pp |
| 5 to 9 | 316 | 6.0% | 6.2% | 326 | 6.2% | 6.4% | -10 | -0.2pp |
| 10 to 14 | 324 | 6.2% | 6.2% | 290 | 5.5% | 6.1% | +34 | +0.7pp |
| 15 to 19 | 299 | 5.7% | 5.8% | 344 | 6.5% | 6.2% | -45 | -0.8pp |
| 20 to 24 | 311 | 5.9% | 5.6% | 326 | 6.2% | 6.0% | -15 | -0.3pp |
| 25 to 29 | 335 | 6.4% | 6.0% | 310 | 5.9% | 5.9% | +25 | +0.5pp |
| 30 to 34 | 315 | 6.0% | 6.3% | 360 | 6.8% | 6.5% | -45 | -0.8pp |
| 35 to 39 | 352 | 6.7% | 6.7% | 339 | 6.4% | 6.3% | +13 | +0.3pp |
| 40 to 44 | 340 | 6.5% | 6.1% | 308 | 5.8% | 6.6% | +32 | +0.7pp |
| 45 to 49 | 323 | 6.2% | 6.4% | 321 | 6.1% | 6.9% | +2 | +0.1pp |
| 50 to 54 | 313 | 6.0% | 6.6% | 304 | 5.7% | 6.7% | +9 | +0.3pp |
| 55 to 59 | 319 | 6.1% | 6.5% | 261 | 4.9% | 6.6% | +58 | +1.2pp |
| 60 to 64 | 270 | 5.2% | 6.3% | 334 | 6.3% | 6.3% | -64 | -1.1pp |
| 65 to 69 | 307 | 5.9% | 5.9% | 390 | 7.4% | 6.1% | -83 | -1.5pp |
| 70 to 74 | 355 | 6.8% | 5.7% | 242 | 4.6% | 4.3% | +113 | +2.2pp |
| 75 to 79 | 199 | 3.8% | 3.8% | 186 | 3.5% | 2.8% | +13 | +0.3pp |
| 80 to 84 | 156 | 3.0% | 2.3% | 140 | 2.6% | 2.0% | +16 | +0.4pp |
| 85 and over | 145 | 2.8% | 2.2% | 143 | 2.7% | 2.1% | +2 | +0.1pp |
| Total | 5,239 | 100.0% | 100.0% | 5,289 | 100.0% | 100.0% | -50 | 0.0pp |