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Hobsons Bay CityCommunity profile

Altona - Seaholme

Five year age groups

In 2021, the largest age group in Altona - Seaholme was 35 to 39 year olds. The group that changed the most since 1991 was 20 to 24 year olds, decreasing by 594 people.

The Age Structure of Altona - Seaholme provides key insights into the level of demand for age based services and facilities such as child care. It is also an indicator of Altona - Seaholme'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 Altona - Seaholme'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
Altona - Seaholme - Total persons (Enumerated)20211991Change
Five year age groups (years)Number%Hobsons Bay City %Number%Hobsons Bay City %1991 to 2021
0 to 47765.86.36475.37.6+129
5 to 98676.56.46515.36.8+216
10 to 147125.35.98206.76.7-108
15 to 195684.24.99657.97.1-397
20 to 245324.05.01,1269.28.8-594
25 to 296645.06.28537.09.0-189
30 to 348956.77.48076.68.8+88
35 to 391,1368.58.17736.37.4+363
40 to 441,0587.97.59217.56.9+137
45 to 499957.47.18336.85.5+162
50 to 549847.47.07446.15.1+240
55 to 597855.96.37366.04.9+49
60 to 648026.05.87326.04.6+70
65 to 696875.14.76245.14.1+63
70 to 746514.94.04513.72.8+200
75 to 795103.82.83172.62.0+193
80 to 843622.72.11371.11.1+225
85 and over3862.92.3900.70.7+296
Total population13,370100.0100.012,227100.0100.0+1,143
Source: Australian Bureau of Statistics, Census of Population and Housing 1991 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 Altona - Seaholme in 2021 compared to Hobsons Bay City 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, 17.6% of the population was aged between 0 and 15, and 19.4% were aged 65 years and over, compared with 18.6% and 16.0% respectively for Hobsons Bay City.

The major differences between the age structure of Altona - Seaholme and Hobsons Bay City were:

  • A larger percentage of persons aged 75 to 79 (3.8% compared to 2.8%)
  • A larger percentage of persons aged 70 to 74 (4.9% compared to 4.0%)
  • A smaller percentage of persons aged 25 to 29 (5.0% compared to 6.2%)
  • A smaller percentage of persons aged 20 to 24 (4.0% compared to 5.0%)

Emerging groups

From 1991 to 2021, Altona - Seaholme's population increased by 1,143 people (9.3%). This represents an average annual population change of 0.3% per year over the period.

The largest changes in age structure in this area between 1991 and 2021 were in the age groups:

  • 20 to 24 (-594 persons)
  • 15 to 19 (-397 persons)
  • 35 to 39 (+363 persons)
  • 85 and over (+296 persons)

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