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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 1996 was 85 and over year olds, increasing by 211 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 | 1996 | Change | ||||
| Five year age groups (years) | Number | % | Port Noarlunga South % | Number | % | Port Noarlunga South % | 1996 to 2021 |
| 0 to 4 | 210 | 4.8 | 6.4 | 222 | 6.4 | 6.0 | -13 |
| 5 to 9 | 273 | 6.2 | 7.0 | 254 | 7.3 | 5.7 | +18 |
| 10 to 14 | 270 | 6.1 | 6.1 | 330 | 9.5 | 8.3 | -60 |
| 15 to 19 | 235 | 5.3 | 4.8 | 274 | 7.9 | 8.1 | -40 |
| 20 to 24 | 227 | 5.1 | 5.2 | 272 | 7.8 | 8.1 | -46 |
| 25 to 29 | 236 | 5.3 | 6.5 | 225 | 6.5 | 6.6 | +10 |
| 30 to 34 | 257 | 5.8 | 6.9 | 233 | 6.7 | 6.5 | +24 |
| 35 to 39 | 300 | 6.8 | 7.3 | 290 | 8.3 | 6.9 | +10 |
| 40 to 44 | 261 | 5.9 | 6.2 | 307 | 8.8 | 7.9 | -47 |
| 45 to 49 | 261 | 5.9 | 7.0 | 304 | 8.7 | 10.2 | -43 |
| 50 to 54 | 244 | 5.5 | 6.4 | 160 | 4.6 | 5.9 | +84 |
| 55 to 59 | 252 | 5.7 | 5.8 | 112 | 3.2 | 5.1 | +140 |
| 60 to 64 | 266 | 6.0 | 5.8 | 112 | 3.2 | 4.3 | +154 |
| 65 to 69 | 281 | 6.4 | 6.5 | 164 | 4.7 | 3.7 | +116 |
| 70 to 74 | 244 | 5.5 | 5.4 | 106 | 3.1 | 3.4 | +137 |
| 75 to 79 | 208 | 4.7 | 3.3 | 67 | 1.9 | 1.9 | +140 |
| 80 to 84 | 172 | 3.9 | 2.1 | 34 | 1.0 | 0.9 | +138 |
| 85 and over | 220 | 5.0 | 1.3 | 9 | 0.3 | 0.6 | +211 |
| Total population | 4,417 | 100.0 | 100.0 | 3,483 | 100.0 | 100.0 | +933 |
Dominant groups
Analysis of the five year age groups of Seaford in 2021 compared to Port Noarlunga 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, 17.0% of the population was aged between 0 and 15, and 25.5% were aged 65 years and over, compared with 19.5% and 18.6% respectively for Port Noarlunga South.
The major differences between the age structure of Seaford and Port Noarlunga South were:
- A larger percentage of persons aged 85 and over (5.0% compared to 1.3%)
- A larger percentage of persons aged 80 to 84 (3.9% compared to 2.1%)
- A larger percentage of persons aged 75 to 79 (4.7% compared to 3.3%)
- A smaller percentage of persons aged 0 to 4 (4.8% compared to 6.4%)
Emerging groups
From 1996 to 2021, Seaford's population increased by 934 people (26.8%). This represents an average annual population change of 0.95% per year over the period.
The largest changes in age structure in this area between 1996 and 2021 were in the age groups:
- 85 and over (+211 persons)
- 60 to 64 (+154 persons)
- 75 to 79 (+140 persons)
- 55 to 59 (+140 persons)
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