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City of BrimbankCommunity profile

Cairnlea

Five year age groups

In 2021, the largest age group in Cairnlea was 45 to 49 year olds. The group that changed the most since 2001 was 45 to 49 year olds, increasing by 784 people.

The Age Structure of Cairnlea provides key insights into the level of demand for age based services and facilities such as child care. It is also an indicator of Cairnlea'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 Cairnlea'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
Cairnlea - Total persons (Enumerated)20212001Change
Five year age groups (years)Number%City of Brimbank %Number%City of Brimbank %2001 to 2021
0 to 45085.15.7318.47.0+477
5 to 97297.36.0338.97.6+696
10 to 147077.05.7308.17.4+677
15 to 197917.95.7297.87.7+762
20 to 247627.66.9287.57.7+734
25 to 297157.18.1338.97.7+682
30 to 345955.97.64211.37.9+553
35 to 396886.87.2359.47.7+653
40 to 447457.46.4287.57.6+717
45 to 498128.16.3287.57.3+784
50 to 547537.56.3215.76.8+732
55 to 596366.36.1123.24.8+624
60 to 645865.85.861.63.7+580
65 to 694274.25.061.63.0+421
70 to 742802.84.330.82.5+277
75 to 791591.63.030.81.9+156
80 to 84690.72.030.81.0+66
85 and over910.91.90--0.7+91
Total population10,053100.0100.0371100.0100.0+9,682
Source: Australian Bureau of Statistics, Census of Population and Housing 2001 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 Cairnlea in 2021 compared to the City of Brimbank shows that there was a higher proportion of people in the younger age groups (under 15) and a lower proportion of people in the older age groups (65+).

Overall, 19.3% of the population was aged between 0 and 15, and 10.2% were aged 65 years and over, compared with 17.4% and 16.2% respectively for the City of Brimbank.

The major differences between the age structure of Cairnlea and the City of Brimbank were:

  • A larger percentage of persons aged 15 to 19 (7.9% compared to 5.7%)
  • A larger percentage of persons aged 45 to 49 (8.1% compared to 6.3%)
  • A smaller percentage of persons aged 30 to 34 (5.9% compared to 7.6%)
  • A smaller percentage of persons aged 70 to 74 (2.8% compared to 4.3%)

Emerging groups

From 2001 to 2021, Cairnlea's population increased by 9,682 people (2609.7%). This represents an average annual population change of 17.94% per year over the period.

The largest changes in age structure in this area between 2001 and 2021 were in the age groups:

  • 45 to 49 (+784 persons)
  • 15 to 19 (+762 persons)
  • 20 to 24 (+734 persons)
  • 50 to 54 (+732 persons)

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