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City of KnoxCommunity profile

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 2016 was 70 to 74 year olds, increasing by 1,774 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.

Q:

Derived from the Census question:

'What is the person's date of birth or age?'

Age structure - Five year age groups
City of Knox - Total persons (Usual residence)20212016Change
Five year age groups (years)Number%Boronia %Number%Boronia %2016 to 2021
0 to 48,4285.36.19,0145.86.7-586
5 to 99,4085.95.79,0635.95.6+345
10 to 149,2755.85.28,9865.84.8+289
15 to 199,3145.94.79,9116.44.9-597
20 to 249,6616.15.410,2006.66.0-539
25 to 299,5186.07.29,9196.47.6-401
30 to 3410,7036.78.710,4136.88.5+290
35 to 3911,3947.28.110,2806.77.3+1,114
40 to 4410,8826.87.210,4716.86.8+411
45 to 4910,6876.76.511,0477.26.4-360
50 to 5410,8616.86.111,0327.26.1-171
55 to 5910,6176.75.710,4976.86.1+120
60 to 649,9136.25.59,3996.16.1+514
65 to 698,6185.45.38,0625.25.7+556
70 to 747,3814.64.75,6073.64.0+1,774
75 to 795,1543.23.24,2292.73.2+925
80 to 843,7422.42.62,8871.92.2+855
85 and over3,5402.22.23,1052.01.9+435
Total population159,096100.0100.0154,122100.0100.0+4,974
Source: Australian Bureau of Statistics, Census of Population and Housing 2016 and 2021. Compiled and presented by .id (informed decisions).
Please refer to specific data notes for more information

Dominant groups

Analysis of the five year age groups of the City of Knox in 2021 compared to Boronia shows that there was a similar proportion of people in the younger age groups (under 15) as well as a similar proportion of people in the older age groups (65+).

Overall, 17.0% of the population was aged between 0 and 15, and 17.9% were aged 65 years and over, compared with 17.0% and 17.9% respectively for Boronia.

The major differences between the age structure of the City of Knox and Boronia were:

  • A larger percentage of persons aged 15 to 19 (5.9% compared to 4.7%)
  • A larger percentage of persons aged 55 to 59 (6.7% compared to 5.7%)
  • A smaller percentage of persons aged 30 to 34 (6.7% compared to 8.7%)
  • A smaller percentage of persons aged 25 to 29 (6.0% compared to 7.2%)

Emerging groups

From 2016 to 2021, City of Knox's population increased by 4,974 people (3.2%). This represents an average annual population change of 0.64% per year over the period.

The largest changes in age structure in this area between 2016 and 2021 were in the age groups:

  • 70 to 74 (+1,774 persons)
  • 35 to 39 (+1,114 persons)
  • 75 to 79 (+925 persons)
  • 80 to 84 (+855 persons)

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