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 Summer Hill (Inner West - NSW), accounting for 11.6% (846 people). This share was higher than Inner West (A) (9.9%). Since 2016, the biggest change was in 5 to 9 year olds, which decreased by 124 people and 1.7 percentage points.
Section overview
Age structure - Five year age groups
Summer Hill (Inner West - NSW) - Total persons (Usual residence)
This table summarises five year age groups for Summer Hill (Inner West - NSW) in 2021 for persons, with comparison against Inner West (A) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Summer Hill (Inner West - NSW), with comparison markers for Inner West (A).
0 to 4
2021 count
367
% of total
5.0%
Change from 2016
-0.6pp
367
5.0%
-0.6pp
5 to 9
2021 count
302
% of total
4.1%
Change from 2016
-1.7pp
302
4.1%
-1.7pp
10 to 14
2021 count
331
% of total
4.5%
Change from 2016
+0.6pp
331
4.5%
+0.6pp
15 to 19
2021 count
256
% of total
3.5%
Change from 2016
-0.1pp
256
3.5%
-0.1pp
20 to 24
2021 count
472
% of total
6.5%
Change from 2016
+0.1pp
472
6.5%
+0.1pp
25 to 29
2021 count
800
% of total
11.0%
Change from 2016
+0.3pp
800
11.0%
+0.3pp
30 to 34
2021 count
846
% of total
11.6%
Change from 2016
+0.6pp
846
11.6%
+0.6pp
35 to 39
2021 count
717
% of total
9.8%
Change from 2016
+0.1pp
717
9.8%
+0.1pp
40 to 44
2021 count
546
% of total
7.5%
Change from 2016
-1.1pp
546
7.5%
-1.1pp
45 to 49
2021 count
557
% of total
7.6%
Change from 2016
+0.6pp
557
7.6%
+0.6pp
50 to 54
2021 count
446
% of total
6.1%
Change from 2016
-0.8pp
446
6.1%
-0.8pp
55 to 59
2021 count
423
% of total
5.8%
Change from 2016
+0.4pp
423
5.8%
+0.4pp
60 to 64
2021 count
342
% of total
4.7%
Change from 2016
+0.1pp
342
4.7%
+0.1pp
65 to 69
2021 count
275
% of total
3.8%
Change from 2016
0.0pp
275
3.8%
0.0pp
70 to 74
2021 count
241
% of total
3.3%
Change from 2016
+1.1pp
241
3.3%
+1.1pp
75 to 79
2021 count
147
% of total
2.0%
Change from 2016
+0.7pp
147
2.0%
+0.7pp
80 to 84
2021 count
92
% of total
1.3%
Change from 2016
-0.1pp
92
1.3%
-0.1pp
85 and over
2021 count
147
% of total
2.0%
Change from 2016
+0.2pp
147
2.0%
+0.2pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-45
-0.6pp
5 to 9
-124
-1.7pp
10 to 14
+49
+0.6pp
15 to 19
-6
-0.1pp
20 to 24
+5
+0.1pp
25 to 29
+16
+0.3pp
30 to 34
+43
+0.6pp
35 to 39
+6
+0.1pp
40 to 44
-84
-1.1pp
45 to 49
+42
+0.6pp
50 to 54
-57
-0.8pp
55 to 59
+31
+0.4pp
60 to 64
+9
+0.1pp
65 to 69
0
0.0pp
70 to 74
+83
+1.1pp
75 to 79
+50
+0.7pp
80 to 84
-11
-0.1pp
85 and over
+13
+0.2pp
Data table
Five year age groups for Summer Hill (Inner West - NSW). Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Inner West (A).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Inner West (A)% | Count | % | Inner West (A)% | Count | pp | |
| 0 to 4 | 367 | 5.0% | 5.0% | 412 | 5.6% | 5.9% | -45 | -0.6pp |
| 5 to 9 | 302 | 4.1% | 4.8% | 426 | 5.8% | 5.3% | -124 | -1.7pp |
| 10 to 14 | 331 | 4.5% | 4.8% | 282 | 3.9% | 4.1% | +49 | +0.6pp |
| 15 to 19 | 256 | 3.5% | 4.1% | 262 | 3.6% | 3.7% | -6 | -0.1pp |
| 20 to 24 | 472 | 6.5% | 6.2% | 467 | 6.4% | 7.0% | +5 | +0.1pp |
| 25 to 29 | 800 | 11.0% | 9.4% | 784 | 10.7% | 10.1% | +16 | +0.3pp |
| 30 to 34 | 846 | 11.6% | 9.9% | 803 | 11.0% | 10.2% | +43 | +0.6pp |
| 35 to 39 | 717 | 9.8% | 9.0% | 711 | 9.7% | 9.0% | +6 | +0.1pp |
| 40 to 44 | 546 | 7.5% | 7.7% | 630 | 8.6% | 8.4% | -84 | -1.1pp |
| 45 to 49 | 557 | 7.6% | 7.5% | 515 | 7.0% | 7.4% | +42 | +0.6pp |
| 50 to 54 | 446 | 6.1% | 6.8% | 503 | 6.9% | 6.5% | -57 | -0.8pp |
| 55 to 59 | 423 | 5.8% | 5.9% | 392 | 5.4% | 5.5% | +31 | +0.4pp |
| 60 to 64 | 342 | 4.7% | 4.9% | 333 | 4.6% | 4.7% | +9 | +0.1pp |
| 65 to 69 | 275 | 3.8% | 4.2% | 275 | 3.8% | 3.9% | 0 | 0.0pp |
| 70 to 74 | 241 | 3.3% | 3.6% | 158 | 2.2% | 2.8% | +83 | +1.1pp |
| 75 to 79 | 147 | 2.0% | 2.5% | 97 | 1.3% | 2.1% | +50 | +0.7pp |
| 80 to 84 | 92 | 1.3% | 1.8% | 103 | 1.4% | 1.7% | -11 | -0.1pp |
| 85 and over | 147 | 2.0% | 2.0% | 134 | 1.8% | 1.7% | +13 | +0.2pp |
| Total | 7,288 | 100.0% | 100.0% | 7,311 | 100.0% | 100.0% | -23 | 0.0pp |