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City of BaysideCommunity profile

Black Rock

Five year age groups

In 2021, the largest age group in Black Rock was 50 to 54 year olds. The group that changed the most since 1996 was 60 to 64 year olds, increasing by 251 people.

The Age Structure of Black Rock provides key insights into the level of demand for age based services and facilities such as child care. It is also an indicator of Black Rock'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 Black Rock'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
Black Rock - Total persons (Enumerated)20211996Change
Five year age groups (years)Number%City of Bayside %Number%City of Bayside %1996 to 2021
0 to 42463.94.52424.65.9+3
5 to 93295.25.93176.16.5+11
10 to 144236.77.33035.86.4+119
15 to 194687.46.92895.56.2+179
20 to 242914.65.23126.05.7-22
25 to 291762.83.62855.45.6-110
30 to 342253.64.22955.66.6-71
35 to 392644.25.43566.88.0-93
40 to 443715.96.43857.37.9-14
45 to 494346.97.84398.48.1-6
50 to 545468.78.33787.26.4+167
55 to 594957.97.32675.14.6+228
60 to 644727.56.42214.23.7+251
65 to 694346.95.42945.64.3+139
70 to 744146.65.33176.04.7+97
75 to 793215.14.02544.83.8+67
80 to 841822.92.71733.33.0+8
85 and over2113.33.41092.12.3+101
Total population6,302100.0100.05,246100.0100.0+1,055
Source: Australian Bureau of Statistics, Census of Population and Housing 1996 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 Black Rock in 2021 compared to the City of Bayside 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, 15.8% of the population was aged between 0 and 15, and 24.8% were aged 65 years and over, compared with 17.6% and 20.8% respectively for the City of Bayside.

The major differences between the age structure of Black Rock and the City of Bayside were:

  • A larger percentage of persons aged 65 to 69 (6.9% compared to 5.4%)
  • A larger percentage of persons aged 70 to 74 (6.6% compared to 5.3%)
  • A larger percentage of persons aged 60 to 64 (7.5% compared to 6.4%)
  • A smaller percentage of persons aged 35 to 39 (4.2% compared to 5.4%)

Emerging groups

From 1996 to 2021, Black Rock's population increased by 1,056 people (20.1%). This represents an average annual population change of 0.74% 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 (+251 persons)
  • 55 to 59 (+228 persons)
  • 15 to 19 (+179 persons)
  • 50 to 54 (+167 persons)

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