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LEARN MORE ABOUT .idIn 2021, the largest age group in Seaford was 35 to 39 year olds. The group that changed the most since 1991 was 15 to 19 year olds, decreasing by 617 people.
The Age Structure of Seaford provides key insights into the level of demand for age based services and facilities such as child care. It is also an indicator of Seaford'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 Seaford'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 | |||||||
|---|---|---|---|---|---|---|---|
| Seaford - Total persons (Enumerated) | 2021 | 1991 | Change | ||||
| Five year age groups (years) | Number | % | Langwarrin South % | Number | % | Langwarrin South % | 1991 to 2021 |
| 0 to 4 | 1,176 | 6.9 | 4.2 | 1,287 | 7.6 | 6.7 | -111 |
| 5 to 9 | 1,007 | 5.9 | 5.6 | 1,239 | 7.3 | 8.9 | -232 |
| 10 to 14 | 849 | 5.0 | 8.7 | 1,262 | 7.4 | 7.6 | -413 |
| 15 to 19 | 780 | 4.6 | 8.3 | 1,397 | 8.2 | 9.3 | -617 |
| 20 to 24 | 790 | 4.6 | 8.1 | 1,386 | 8.2 | 7.0 | -596 |
| 25 to 29 | 1,012 | 5.9 | 4.2 | 1,413 | 8.3 | 6.7 | -401 |
| 30 to 34 | 1,315 | 7.7 | 2.2 | 1,403 | 8.3 | 7.8 | -88 |
| 35 to 39 | 1,425 | 8.4 | 5.0 | 1,321 | 7.8 | 8.0 | +104 |
| 40 to 44 | 1,246 | 7.3 | 7.0 | 1,359 | 8.0 | 10.7 | -113 |
| 45 to 49 | 1,273 | 7.5 | 9.2 | 1,035 | 6.1 | 7.1 | +238 |
| 50 to 54 | 1,159 | 6.8 | 9.6 | 852 | 5.0 | 6.3 | +307 |
| 55 to 59 | 998 | 5.9 | 8.0 | 662 | 3.9 | 5.4 | +336 |
| 60 to 64 | 1,027 | 6.0 | 6.3 | 580 | 3.4 | 3.4 | +447 |
| 65 to 69 | 843 | 4.9 | 5.9 | 578 | 3.4 | 1.8 | +265 |
| 70 to 74 | 780 | 4.6 | 3.9 | 464 | 2.7 | 1.5 | +316 |
| 75 to 79 | 606 | 3.6 | 2.3 | 406 | 2.4 | 1.5 | +200 |
| 80 to 84 | 386 | 2.3 | 0.7 | 206 | 1.2 | 0.5 | +180 |
| 85 and over | 359 | 2.1 | 1.0 | 137 | 0.8 | -- | +222 |
| Total population | 17,031 | 100.0 | 100.0 | 16,987 | 100.0 | 100.0 | +44 |
Dominant groups
Analysis of the five year age groups of Seaford in 2021 compared to Langwarrin South 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, 17.8% of the population was aged between 0 and 15, and 17.5% were aged 65 years and over, compared with 18.4% and 13.8% respectively for Langwarrin South.
The major differences between the age structure of Seaford and Langwarrin South were:
- A larger percentage of persons aged 30 to 34 (7.7% compared to 2.2%)
- A smaller percentage of persons aged 15 to 19 (4.6% compared to 8.3%)
- A smaller percentage of persons aged 10 to 14 (5.0% compared to 8.7%)
- A smaller percentage of persons aged 20 to 24 (4.6% compared to 8.1%)
Emerging groups
From 1991 to 2021, Seaford's population increased by 44 people (0.3%). This represents an average annual population change of 0.01% per year over the period.
The largest changes in age structure in this area between 1991 and 2021 were in the age groups:
- 15 to 19 (-617 persons)
- 20 to 24 (-596 persons)
- 60 to 64 (+447 persons)
- 10 to 14 (-413 persons)
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