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, 35 to 39 year olds was the largest age group among residents in Oak Park, accounting for 11% (738 people). This share was higher than Moreland (C) (9.5%). Since 2016, the biggest change was in 35 to 39 year olds, which increased by 166 people and 1.8 percentage points.
Section overview
Age structure - Five year age groups
Oak Park - Total persons (Usual residence)
This table summarises five year age groups for Oak Park in 2021 for persons, with comparison against Moreland (C) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Oak Park, with comparison markers for Moreland (C).
0 to 4
2021 count
435
% of total
6.5%
Change from 2016
-0.2pp
435
6.5%
-0.2pp
5 to 9
2021 count
378
% of total
5.6%
Change from 2016
-0.6pp
378
5.6%
-0.6pp
10 to 14
2021 count
309
% of total
4.6%
Change from 2016
-0.2pp
309
4.6%
-0.2pp
15 to 19
2021 count
286
% of total
4.3%
Change from 2016
-1.4pp
286
4.3%
-1.4pp
20 to 24
2021 count
486
% of total
7.2%
Change from 2016
+1.1pp
486
7.2%
+1.1pp
25 to 29
2021 count
589
% of total
8.8%
Change from 2016
+0.1pp
589
8.8%
+0.1pp
30 to 34
2021 count
673
% of total
10.0%
Change from 2016
-0.1pp
673
10.0%
-0.1pp
35 to 39
2021 count
738
% of total
11.0%
Change from 2016
+1.8pp
738
11.0%
+1.8pp
40 to 44
2021 count
488
% of total
7.3%
Change from 2016
+0.6pp
488
7.3%
+0.6pp
45 to 49
2021 count
397
% of total
5.9%
Change from 2016
-0.7pp
397
5.9%
-0.7pp
50 to 54
2021 count
401
% of total
6.0%
Change from 2016
+0.3pp
401
6.0%
+0.3pp
55 to 59
2021 count
358
% of total
5.3%
Change from 2016
-0.7pp
358
5.3%
-0.7pp
60 to 64
2021 count
338
% of total
5.0%
Change from 2016
+0.7pp
338
5.0%
+0.7pp
65 to 69
2021 count
244
% of total
3.6%
Change from 2016
+0.2pp
244
3.6%
+0.2pp
70 to 74
2021 count
170
% of total
2.5%
Change from 2016
+0.3pp
170
2.5%
+0.3pp
75 to 79
2021 count
134
% of total
2.0%
Change from 2016
-0.5pp
134
2.0%
-0.5pp
80 to 84
2021 count
128
% of total
1.9%
Change from 2016
-0.7pp
128
1.9%
-0.7pp
85 and over
2021 count
146
% of total
2.2%
Change from 2016
-0.1pp
146
2.2%
-0.1pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
+17
-0.2pp
5 to 9
-7
-0.6pp
10 to 14
+12
-0.2pp
15 to 19
-68
-1.4pp
20 to 24
+107
+1.1pp
25 to 29
+49
+0.1pp
30 to 34
+44
-0.1pp
35 to 39
+166
+1.8pp
40 to 44
+74
+0.6pp
45 to 49
-13
-0.7pp
50 to 54
+48
+0.3pp
55 to 59
-15
-0.7pp
60 to 64
+70
+0.7pp
65 to 69
+30
+0.2pp
70 to 74
+34
+0.3pp
75 to 79
-21
-0.5pp
80 to 84
-35
-0.7pp
85 and over
+5
-0.1pp
Data table
Five year age groups for Oak Park. Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Moreland (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Moreland (C)% | Count | % | Moreland (C)% | Count | pp | |
| 0 to 4 | 435 | 6.5% | 5.7% | 418 | 6.7% | 6.3% | +17 | -0.2pp |
| 5 to 9 | 378 | 5.6% | 5.2% | 385 | 6.2% | 5.4% | -7 | -0.6pp |
| 10 to 14 | 309 | 4.6% | 4.6% | 297 | 4.8% | 4.4% | +12 | -0.2pp |
| 15 to 19 | 286 | 4.3% | 4.2% | 354 | 5.7% | 4.4% | -68 | -1.4pp |
| 20 to 24 | 486 | 7.2% | 7.3% | 379 | 6.1% | 7.9% | +107 | +1.1pp |
| 25 to 29 | 589 | 8.8% | 10.5% | 540 | 8.7% | 11.0% | +49 | +0.1pp |
| 30 to 34 | 673 | 10.0% | 11.1% | 629 | 10.1% | 10.8% | +44 | -0.1pp |
| 35 to 39 | 738 | 11.0% | 9.5% | 572 | 9.2% | 8.7% | +166 | +1.8pp |
| 40 to 44 | 488 | 7.3% | 7.2% | 414 | 6.7% | 7.1% | +74 | +0.6pp |
| 45 to 49 | 397 | 5.9% | 6.3% | 410 | 6.6% | 6.3% | -13 | -0.7pp |
| 50 to 54 | 401 | 6.0% | 5.8% | 353 | 5.7% | 5.5% | +48 | +0.3pp |
| 55 to 59 | 358 | 5.3% | 5.0% | 373 | 6.0% | 4.7% | -15 | -0.7pp |
| 60 to 64 | 338 | 5.0% | 4.2% | 268 | 4.3% | 3.8% | +70 | +0.7pp |
| 65 to 69 | 244 | 3.6% | 3.3% | 214 | 3.4% | 3.3% | +30 | +0.2pp |
| 70 to 74 | 170 | 2.5% | 2.8% | 136 | 2.2% | 2.6% | +34 | +0.3pp |
| 75 to 79 | 134 | 2.0% | 2.2% | 155 | 2.5% | 2.8% | -21 | -0.5pp |
| 80 to 84 | 128 | 1.9% | 2.2% | 163 | 2.6% | 2.4% | -35 | -0.7pp |
| 85 and over | 146 | 2.2% | 2.7% | 141 | 2.3% | 2.7% | +5 | -0.1pp |
| Total | 6,714 | 100.0% | 100.0% | 6,205 | 100.0% | 100.0% | +509 | 0.0pp |