City of Knox
Five year age groups
In 2021, the largest age group in the City of Knox was 35 to 39 year olds. The group that changed the most since 1996 was 60 to 64 year olds, increasing by 6,240 people.
The Age Structure of the City of Knox provides key insights into the level of demand for age based services and facilities such as child care. It is also an indicator of the City of Knox's residential role and function and how it is likely to change in the future.
Five year age groups present a classic age profile of the population. Each age group covers exactly five years, which enables direct comparison between each group.
To get a more complete picture the City of Knox's Age Structure should be viewed in conjunction with Household Types and Dwelling Types.
Derived from the Census question:
'What is the person's date of birth or age?'
Total population
| Age structure - Five year age groups | ||||||||
|---|---|---|---|---|---|---|---|---|
| City of Knox - Total persons (Enumerated) | 2021 | 1996 | Change | |||||
| Five year age groups (years) | Number | % | Rowville (North) % | Number | % | Rowville (North) % | 1996 to 2021 | |
| 0 to 4 | 8,463 | 5.3 | 4.9 | 10,402 | 8.0 | 14.5 | -1,939 | 2001 |
| 5 to 9 | 9,400 | 5.9 | 6.1 | 10,916 | 8.4 | 10.9 | -1,516 | 2002 |
| 10 to 14 | 9,277 | 5.9 | 7.5 | 10,763 | 8.3 | 7.7 | -1,486 | 2003 |
| 15 to 19 | 9,307 | 5.9 | 7.7 | 10,318 | 7.9 | 4.4 | -1,011 | 2004 |
| 20 to 24 | 9,636 | 6.1 | 6.9 | 9,208 | 7.1 | 5.0 | +428 | 2005 |
| 25 to 29 | 9,493 | 6.0 | 4.6 | 9,643 | 7.4 | 12.6 | -150 | 2006 |
| 30 to 34 | 10,679 | 6.7 | 4.8 | 10,704 | 8.2 | 15.0 | -25 | 2007 |
| 35 to 39 | 11,405 | 7.2 | 5.9 | 11,318 | 8.7 | 11.3 | +87 | 2008 |
| 40 to 44 | 10,867 | 6.9 | 6.5 | 10,954 | 8.4 | 7.1 | -87 | 2009 |
| 45 to 49 | 10,671 | 6.7 | 8.2 | 10,163 | 7.8 | 4.3 | +508 | 2010 |
| 50 to 54 | 10,813 | 6.8 | 8.5 | 7,255 | 5.6 | 1.9 | +3,558 | 2011 |
| 55 to 59 | 10,559 | 6.7 | 7.9 | 4,989 | 3.8 | 1.5 | +5,570 | 2012 |
| 60 to 64 | 9,785 | 6.2 | 5.7 | 3,545 | 2.7 | 1.5 | +6,240 | 2013 |
| 65 to 69 | 8,420 | 5.3 | 4.0 | 2,938 | 2.3 | 1.1 | +5,482 | 2014 |
| 70 to 74 | 7,250 | 4.6 | 3.9 | 2,618 | 2.0 | 0.9 | +4,632 | 2015 |
| 75 to 79 | 5,073 | 3.2 | 2.8 | 1,968 | 1.5 | 0.2 | +3,105 | 2016 |
| 80 to 84 | 3,730 | 2.4 | 2.3 | 1,498 | 1.1 | 0.0 | +2,232 | 2017 |
| 85 and over | 3,576 | 2.3 | 1.7 | 1,200 | 0.9 | 0.1 | +2,376 | 2018 |
| Total population | 158,404 | 100.0 | 100.0 | 130,400 | 100.0 | 100.0 | +28,004 | |
Source: Australian Bureau of Statistics, Census of Population and Housing (opens a new window) 1996 and 2021. Compiled and presented by .id (opens a new window)(informed decisions).
(Enumerated data)
Compiled and presented in profile.id by .id (informed decisions).
Compiled and presented in profile.id by .id (informed decisions).
Dominant groups
Analysis of the five year age groups of the City of Knox in 2021 compared to Rowville (North) shows that there was a lower proportion of people in the younger age groups (under 15) and a higher proportion of people in the older age groups (65+).
Overall, 17.1% of the population was aged between 0 and 15, and 17.7% were aged 65 years and over, compared with 18.6% and 14.7% respectively for Rowville (North).
The major differences between the age structure of the City of Knox and Rowville (North) were:
- A larger percentage of persons aged 30 to 34 (6.7% compared to 4.8%)
- A smaller percentage of persons aged 15 to 19 (5.9% compared to 7.7%)
- A smaller percentage of persons aged 10 to 14 (5.9% compared to 7.5%)
- A smaller percentage of persons aged 50 to 54 (6.8% compared to 8.5%)
Emerging groups
From 1996 to 2021, City of Knox's population increased by 28,004 people (21.5%). This represents an average annual population change of 0.78% per year over the period.
The largest changes in age structure in this area between 1996 and 2021 were in the age groups:
- 60 to 64 (+6,240 persons)
- 55 to 59 (+5,570 persons)
- 65 to 69 (+5,482 persons)
- 70 to 74 (+4,632 persons)