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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 85 and over year olds, increasing by 220 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 | % | Sellicks Beach % | Number | % | Sellicks Beach % | 1991 to 2021 |
| 0 to 4 | 210 | 4.8 | 5.5 | 239 | 7.8 | 9.1 | -29 |
| 5 to 9 | 273 | 6.2 | 7.2 | 297 | 9.7 | 8.9 | -24 |
| 10 to 14 | 270 | 6.1 | 5.9 | 300 | 9.8 | 8.3 | -30 |
| 15 to 19 | 235 | 5.3 | 5.4 | 252 | 8.2 | 4.9 | -17 |
| 20 to 24 | 227 | 5.1 | 5.6 | 156 | 5.1 | 5.6 | +71 |
| 25 to 29 | 236 | 5.3 | 5.7 | 183 | 6.0 | 9.9 | +53 |
| 30 to 34 | 257 | 5.8 | 6.4 | 289 | 9.4 | 10.6 | -32 |
| 35 to 39 | 300 | 6.8 | 7.1 | 298 | 9.7 | 9.4 | +2 |
| 40 to 44 | 261 | 5.9 | 5.7 | 301 | 9.8 | 6.6 | -40 |
| 45 to 49 | 261 | 5.9 | 6.4 | 169 | 5.5 | 3.8 | +92 |
| 50 to 54 | 244 | 5.5 | 8.2 | 115 | 3.8 | 3.8 | +129 |
| 55 to 59 | 252 | 5.7 | 7.7 | 93 | 3.0 | 3.5 | +159 |
| 60 to 64 | 266 | 6.0 | 6.7 | 117 | 3.8 | 5.4 | +149 |
| 65 to 69 | 281 | 6.4 | 6.4 | 126 | 4.1 | 3.3 | +155 |
| 70 to 74 | 244 | 5.5 | 5.3 | 70 | 2.3 | 3.5 | +174 |
| 75 to 79 | 208 | 4.7 | 3.0 | 46 | 1.5 | 1.7 | +162 |
| 80 to 84 | 172 | 3.9 | 1.4 | 13 | 0.4 | 1.2 | +159 |
| 85 and over | 220 | 5.0 | 0.5 | 0 | -- | 0.5 | +220 |
| Total population | 4,417 | 100.0 | 100.0 | 3,065 | 100.0 | 100.0 | +1,351 |
Dominant groups
Analysis of the five year age groups of Seaford in 2021 compared to Sellicks Beach 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 18.5% and 16.7% respectively for Sellicks Beach.
The major differences between the age structure of Seaford and Sellicks Beach were:
- A larger percentage of persons aged 85 and over (5.0% compared to 0.5%)
- A larger percentage of persons aged 80 to 84 (3.9% compared to 1.4%)
- A smaller percentage of persons aged 50 to 54 (5.5% compared to 8.2%)
- A smaller percentage of persons aged 55 to 59 (5.7% compared to 7.7%)
Emerging groups
From 1991 to 2021, Seaford's population increased by 1,352 people (44.1%). This represents an average annual population change of 1.23% per year over the period.
The largest changes in age structure in this area between 1991 and 2021 were in the age groups:
- 85 and over (+220 persons)
- 70 to 74 (+174 persons)
- 75 to 79 (+162 persons)
- 55 to 59 (+159 persons)
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