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, 20 to 24 year olds was the largest age group among residents in Greenfield Park, accounting for 7.6% (409 people). This share was higher than Fairfield (C) (7%). Since 2016, the biggest change was in 70 to 74 year olds, which increased by 77 people and 1.2 percentage points.
Section overview
Age structure - Five year age groups
Greenfield Park - Total persons (Usual residence)
This table summarises five year age groups for Greenfield Park in 2021 for persons, with comparison against Fairfield (C) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Greenfield Park, with comparison markers for Fairfield (C).
0 to 4
2021 count
283
% of total
5.2%
Change from 2016
-0.5pp
283
5.2%
-0.5pp
5 to 9
2021 count
338
% of total
6.3%
Change from 2016
-0.4pp
338
6.3%
-0.4pp
10 to 14
2021 count
351
% of total
6.5%
Change from 2016
-0.6pp
351
6.5%
-0.6pp
15 to 19
2021 count
406
% of total
7.5%
Change from 2016
-0.7pp
406
7.5%
-0.7pp
20 to 24
2021 count
409
% of total
7.6%
Change from 2016
+0.6pp
409
7.6%
+0.6pp
25 to 29
2021 count
341
% of total
6.3%
Change from 2016
-0.8pp
341
6.3%
-0.8pp
30 to 34
2021 count
313
% of total
5.8%
Change from 2016
0.0pp
313
5.8%
0.0pp
35 to 39
2021 count
337
% of total
6.2%
Change from 2016
+0.8pp
337
6.2%
+0.8pp
40 to 44
2021 count
304
% of total
5.6%
Change from 2016
-0.3pp
304
5.6%
-0.3pp
45 to 49
2021 count
315
% of total
5.8%
Change from 2016
-1.3pp
315
5.8%
-1.3pp
50 to 54
2021 count
352
% of total
6.5%
Change from 2016
-0.1pp
352
6.5%
-0.1pp
55 to 59
2021 count
374
% of total
6.9%
Change from 2016
-0.6pp
374
6.9%
-0.6pp
60 to 64
2021 count
366
% of total
6.8%
Change from 2016
+0.4pp
366
6.8%
+0.4pp
65 to 69
2021 count
305
% of total
5.7%
Change from 2016
+0.6pp
305
5.7%
+0.6pp
70 to 74
2021 count
249
% of total
4.6%
Change from 2016
+1.2pp
249
4.6%
+1.2pp
75 to 79
2021 count
174
% of total
3.2%
Change from 2016
+1.1pp
174
3.2%
+1.1pp
80 to 84
2021 count
93
% of total
1.7%
Change from 2016
+0.3pp
93
1.7%
+0.3pp
85 and over
2021 count
77
% of total
1.4%
Change from 2016
+0.4pp
77
1.4%
+0.4pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-7
-0.5pp
5 to 9
-4
-0.4pp
10 to 14
-8
-0.6pp
15 to 19
-13
-0.7pp
20 to 24
+54
+0.6pp
25 to 29
-22
-0.8pp
30 to 34
+17
0.0pp
35 to 39
+60
+0.8pp
40 to 44
+4
-0.3pp
45 to 49
-47
-1.3pp
50 to 54
+15
-0.1pp
55 to 59
-10
-0.6pp
60 to 64
+38
+0.4pp
65 to 69
+44
+0.6pp
70 to 74
+77
+1.2pp
75 to 79
+67
+1.1pp
80 to 84
+22
+0.3pp
85 and over
+27
+0.4pp
Data table
Five year age groups for Greenfield Park. Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Fairfield (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Fairfield (C)% | Count | % | Fairfield (C)% | Count | pp | |
| 0 to 4 | 283 | 5.2% | 5.2% | 290 | 5.7% | 6.1% | -7 | -0.5pp |
| 5 to 9 | 338 | 6.3% | 6.1% | 342 | 6.7% | 6.4% | -4 | -0.4pp |
| 10 to 14 | 351 | 6.5% | 6.6% | 359 | 7.1% | 6.6% | -8 | -0.6pp |
| 15 to 19 | 406 | 7.5% | 6.9% | 419 | 8.2% | 7.1% | -13 | -0.7pp |
| 20 to 24 | 409 | 7.6% | 7.0% | 355 | 7.0% | 7.7% | +54 | +0.6pp |
| 25 to 29 | 341 | 6.3% | 6.8% | 363 | 7.1% | 7.1% | -22 | -0.8pp |
| 30 to 34 | 313 | 5.8% | 6.2% | 296 | 5.8% | 6.6% | +17 | 0.0pp |
| 35 to 39 | 337 | 6.2% | 6.1% | 277 | 5.4% | 6.0% | +60 | +0.8pp |
| 40 to 44 | 304 | 5.6% | 5.9% | 300 | 5.9% | 6.4% | +4 | -0.3pp |
| 45 to 49 | 315 | 5.8% | 6.4% | 362 | 7.1% | 6.8% | -47 | -1.3pp |
| 50 to 54 | 352 | 6.5% | 6.7% | 337 | 6.6% | 6.8% | +15 | -0.1pp |
| 55 to 59 | 374 | 6.9% | 6.8% | 384 | 7.5% | 6.8% | -10 | -0.6pp |
| 60 to 64 | 366 | 6.8% | 6.6% | 328 | 6.4% | 5.7% | +38 | +0.4pp |
| 65 to 69 | 305 | 5.7% | 5.5% | 261 | 5.1% | 4.6% | +44 | +0.6pp |
| 70 to 74 | 249 | 4.6% | 4.3% | 172 | 3.4% | 3.1% | +77 | +1.2pp |
| 75 to 79 | 174 | 3.2% | 2.8% | 107 | 2.1% | 2.5% | +67 | +1.1pp |
| 80 to 84 | 93 | 1.7% | 2.1% | 71 | 1.4% | 1.8% | +22 | +0.3pp |
| 85 and over | 77 | 1.4% | 2.1% | 50 | 1.0% | 1.8% | +27 | +0.4pp |
| Total | 5,394 | 100.0% | 100.0% | 5,092 | 100.0% | 100.0% | +302 | 0.0pp |