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, 55 to 59 year olds was the largest age group among residents in Upper Ferntree Gully (part), accounting for 7.4% (252 people). This share was higher than Knox (C) (6.7%). Since 2016, the biggest change was in 40 to 44 year olds, which decreased by 674 people and 2.2 percentage points.
Section overview
Age structure - Five year age groups
Upper Ferntree Gully (part) - Total persons (Usual residence)
This table summarises five year age groups for Upper Ferntree Gully (part) in 2021 for persons, with comparison against Knox (C) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Upper Ferntree Gully (part), with comparison markers for Knox (C).
0 to 4
2021 count
174
% of total
5.1%
Change from 2016
-1.0pp
174
5.1%
-1.0pp
5 to 9
2021 count
204
% of total
6.0%
Change from 2016
-0.9pp
204
6.0%
-0.9pp
10 to 14
2021 count
194
% of total
5.7%
Change from 2016
-2.2pp
194
5.7%
-2.2pp
15 to 19
2021 count
202
% of total
5.9%
Change from 2016
0.0pp
202
5.9%
0.0pp
20 to 24
2021 count
194
% of total
5.7%
Change from 2016
+1.1pp
194
5.7%
+1.1pp
25 to 29
2021 count
184
% of total
5.4%
Change from 2016
+0.5pp
184
5.4%
+0.5pp
30 to 34
2021 count
229
% of total
6.7%
Change from 2016
+0.5pp
229
6.7%
+0.5pp
35 to 39
2021 count
229
% of total
6.7%
Change from 2016
-0.7pp
229
6.7%
-0.7pp
40 to 44
2021 count
219
% of total
6.4%
Change from 2016
-2.2pp
219
6.4%
-2.2pp
45 to 49
2021 count
230
% of total
6.7%
Change from 2016
-0.7pp
230
6.7%
-0.7pp
50 to 54
2021 count
239
% of total
7.0%
Change from 2016
+1.1pp
239
7.0%
+1.1pp
55 to 59
2021 count
252
% of total
7.4%
Change from 2016
+1.9pp
252
7.4%
+1.9pp
60 to 64
2021 count
241
% of total
7.1%
Change from 2016
+1.9pp
241
7.1%
+1.9pp
65 to 69
2021 count
199
% of total
5.8%
Change from 2016
+1.0pp
199
5.8%
+1.0pp
70 to 74
2021 count
144
% of total
4.2%
Change from 2016
-0.9pp
144
4.2%
-0.9pp
75 to 79
2021 count
109
% of total
3.2%
Change from 2016
-0.6pp
109
3.2%
-0.6pp
80 to 84
2021 count
77
% of total
2.3%
Change from 2016
+0.2pp
77
2.3%
+0.2pp
85 and over
2021 count
102
% of total
3.0%
Change from 2016
+1.1pp
102
3.0%
+1.1pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-463
-1.0pp
5 to 9
-519
-0.9pp
10 to 14
-632
-2.2pp
15 to 19
-419
0.0pp
20 to 24
-291
+1.1pp
25 to 29
-323
+0.5pp
30 to 34
-416
+0.5pp
35 to 39
-539
-0.7pp
40 to 44
-674
-2.2pp
45 to 49
-543
-0.7pp
50 to 54
-382
+1.1pp
55 to 59
-324
+1.9pp
60 to 64
-304
+1.9pp
65 to 69
-300
+1.0pp
70 to 74
-388
-0.9pp
75 to 79
-292
-0.6pp
80 to 84
-144
+0.2pp
85 and over
-92
+1.1pp
Data table
Five year age groups for Upper Ferntree Gully (part). Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Knox (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Knox (C)% | Count | % | Knox (C)% | Count | pp | |
| 0 to 4 | 174 | 5.1% | 5.3% | 637 | 6.1% | 5.9% | -463 | -1.0pp |
| 5 to 9 | 204 | 6.0% | 5.9% | 723 | 6.9% | 5.9% | -519 | -0.9pp |
| 10 to 14 | 194 | 5.7% | 5.8% | 826 | 7.9% | 5.8% | -632 | -2.2pp |
| 15 to 19 | 202 | 5.9% | 5.9% | 621 | 5.9% | 6.4% | -419 | 0.0pp |
| 20 to 24 | 194 | 5.7% | 6.1% | 485 | 4.6% | 6.6% | -291 | +1.1pp |
| 25 to 29 | 184 | 5.4% | 6.0% | 507 | 4.9% | 6.4% | -323 | +0.5pp |
| 30 to 34 | 229 | 6.7% | 6.7% | 645 | 6.2% | 6.8% | -416 | +0.5pp |
| 35 to 39 | 229 | 6.7% | 7.2% | 768 | 7.4% | 6.7% | -539 | -0.7pp |
| 40 to 44 | 219 | 6.4% | 6.8% | 893 | 8.6% | 6.8% | -674 | -2.2pp |
| 45 to 49 | 230 | 6.7% | 6.7% | 773 | 7.4% | 7.2% | -543 | -0.7pp |
| 50 to 54 | 239 | 7.0% | 6.8% | 621 | 5.9% | 7.2% | -382 | +1.1pp |
| 55 to 59 | 252 | 7.4% | 6.7% | 576 | 5.5% | 6.8% | -324 | +1.9pp |
| 60 to 64 | 241 | 7.1% | 6.2% | 545 | 5.2% | 6.1% | -304 | +1.9pp |
| 65 to 69 | 199 | 5.8% | 5.4% | 499 | 4.8% | 5.2% | -300 | +1.0pp |
| 70 to 74 | 144 | 4.2% | 4.6% | 532 | 5.1% | 3.6% | -388 | -0.9pp |
| 75 to 79 | 109 | 3.2% | 3.2% | 401 | 3.8% | 2.7% | -292 | -0.6pp |
| 80 to 84 | 77 | 2.3% | 2.4% | 221 | 2.1% | 1.9% | -144 | +0.2pp |
| 85 and over | 102 | 3.0% | 2.2% | 194 | 1.9% | 2.0% | -92 | +1.1pp |
| Total | 3,417 | 100.0% | 100.0% | 10,442 | 100.0% | 100.0% | -7,025 | 0.0pp |