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, 40 to 44 year olds was the largest age group among residents in Kellyville Ridge, accounting for 10.3% (1,119 people). This share was higher than Blacktown (C) (7.8%). Since 2016, the biggest change was in 40 to 44 year olds, which increased by 1,119 people and 10.3 percentage points.
Section overview
Age structure - Five year age groups
Kellyville Ridge - Total persons (Usual residence)
This table summarises five year age groups for Kellyville Ridge in 2021 for persons, with comparison against Blacktown (C) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Kellyville Ridge, with comparison markers for Blacktown (C).
0 to 4
2021 count
726
% of total
6.7%
Change from 2016
+6.7pp
726
6.7%
+6.7pp
5 to 9
2021 count
1,064
% of total
9.8%
Change from 2016
+9.8pp
1,064
9.8%
+9.8pp
10 to 14
2021 count
1,046
% of total
9.6%
Change from 2016
+2.5pp
1,046
9.6%
+2.5pp
15 to 19
2021 count
844
% of total
7.8%
Change from 2016
+7.8pp
844
7.8%
+7.8pp
20 to 24
2021 count
631
% of total
5.8%
Change from 2016
+5.8pp
631
5.8%
+5.8pp
25 to 29
2021 count
492
% of total
4.5%
Change from 2016
+4.5pp
492
4.5%
+4.5pp
30 to 34
2021 count
619
% of total
5.7%
Change from 2016
+5.7pp
619
5.7%
+5.7pp
35 to 39
2021 count
1,068
% of total
9.8%
Change from 2016
+2.7pp
1,068
9.8%
+2.7pp
40 to 44
2021 count
1,119
% of total
10.3%
Change from 2016
+10.3pp
1,119
10.3%
+10.3pp
45 to 49
2021 count
1,063
% of total
9.8%
Change from 2016
+9.8pp
1,063
9.8%
+9.8pp
50 to 54
2021 count
731
% of total
6.7%
Change from 2016
+6.7pp
731
6.7%
+6.7pp
55 to 59
2021 count
466
% of total
4.3%
Change from 2016
+4.3pp
466
4.3%
+4.3pp
60 to 64
2021 count
348
% of total
3.2%
Change from 2016
-3.9pp
348
3.2%
-3.9pp
65 to 69
2021 count
257
% of total
2.4%
Change from 2016
+2.4pp
257
2.4%
+2.4pp
70 to 74
2021 count
207
% of total
1.9%
Change from 2016
+1.9pp
207
1.9%
+1.9pp
75 to 79
2021 count
134
% of total
1.2%
Change from 2016
+1.2pp
134
1.2%
+1.2pp
80 to 84
2021 count
57
% of total
0.5%
Change from 2016
-6.6pp
57
0.5%
-6.6pp
85 and over
2021 count
40
% of total
0.4%
Change from 2016
+0.4pp
40
0.4%
+0.4pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
+726
+6.7pp
5 to 9
+1,064
+9.8pp
10 to 14
+1,043
+2.5pp
15 to 19
+844
+7.8pp
20 to 24
+631
+5.8pp
25 to 29
+492
+4.5pp
30 to 34
+619
+5.7pp
35 to 39
+1,065
+2.7pp
40 to 44
+1,119
+10.3pp
45 to 49
+1,063
+9.8pp
50 to 54
+731
+6.7pp
55 to 59
+466
+4.3pp
60 to 64
+345
-3.9pp
65 to 69
+257
+2.4pp
70 to 74
+207
+1.9pp
75 to 79
+134
+1.2pp
80 to 84
+54
-6.6pp
85 and over
+40
+0.4pp
Data table
Five year age groups for Kellyville Ridge. Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Blacktown (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Blacktown (C)% | Count | % | Blacktown (C)% | Count | pp | |
| 0 to 4 | 726 | 6.7% | 7.5% | 0 | 0.0% | 8.0% | +726 | +6.7pp |
| 5 to 9 | 1,064 | 9.8% | 7.9% | 0 | 0.0% | 7.9% | +1,064 | +9.8pp |
| 10 to 14 | 1,046 | 9.6% | 7.3% | 3 | 7.1% | 6.9% | +1,043 | +2.5pp |
| 15 to 19 | 844 | 7.8% | 6.1% | 0 | 0.0% | 6.9% | +844 | +7.8pp |
| 20 to 24 | 631 | 5.8% | 6.7% | 0 | 0.0% | 6.8% | +631 | +5.8pp |
| 25 to 29 | 492 | 4.5% | 7.0% | 0 | 0.0% | 7.2% | +492 | +4.5pp |
| 30 to 34 | 619 | 5.7% | 7.9% | 0 | 0.0% | 8.3% | +619 | +5.7pp |
| 35 to 39 | 1,068 | 9.8% | 9.2% | 3 | 7.1% | 8.1% | +1,065 | +2.7pp |
| 40 to 44 | 1,119 | 10.3% | 7.8% | 0 | 0.0% | 7.2% | +1,119 | +10.3pp |
| 45 to 49 | 1,063 | 9.8% | 6.4% | 0 | 0.0% | 6.5% | +1,063 | +9.8pp |
| 50 to 54 | 731 | 6.7% | 5.6% | 0 | 0.0% | 6.0% | +731 | +6.7pp |
| 55 to 59 | 466 | 4.3% | 5.1% | 0 | 0.0% | 5.4% | +466 | +4.3pp |
| 60 to 64 | 348 | 3.2% | 4.5% | 3 | 7.1% | 4.6% | +345 | -3.9pp |
| 65 to 69 | 257 | 2.4% | 3.7% | 0 | 0.0% | 3.8% | +257 | +2.4pp |
| 70 to 74 | 207 | 1.9% | 3.1% | 0 | 0.0% | 2.5% | +207 | +1.9pp |
| 75 to 79 | 134 | 1.2% | 1.9% | 0 | 0.0% | 1.7% | +134 | +1.2pp |
| 80 to 84 | 57 | 0.5% | 1.2% | 3 | 7.1% | 1.1% | +54 | -6.6pp |
| 85 and over | 40 | 0.4% | 1.1% | 0 | 0.0% | 1.1% | +40 | +0.4pp |
| Total | 10,890 | 100.0% | 100.0% | 42 | 100.0% | 100.0% | +10,848 | 0.0pp |