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LEARN MORE ABOUT .idIn 2021, the largest age group in Cotham Ward was 15 to 19 year olds. The group that changed the most since 2016 was 80 to 84 year olds, increasing by 121 people.
The Age Structure of Cotham Ward provides key insights into the level of demand for age based services and facilities such as child care. It is also an indicator of Cotham Ward'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 Cotham Ward'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 | |||||||
|---|---|---|---|---|---|---|---|
| Cotham Ward - Total persons (Usual residence) | 2021 | 2016 | Change | ||||
| Five year age groups (years) | Number | % | Ashburton % | Number | % | Ashburton % | 2016 to 2021 |
| 0 to 4 | 526 | 3.3 | 5.2 | 576 | 3.6 | 6.7 | -51 |
| 5 to 9 | 755 | 4.8 | 7.0 | 840 | 5.3 | 7.7 | -86 |
| 10 to 14 | 1,072 | 6.8 | 7.7 | 1,126 | 7.1 | 7.2 | -54 |
| 15 to 19 | 1,260 | 8.0 | 7.0 | 1,281 | 8.1 | 6.3 | -22 |
| 20 to 24 | 1,186 | 7.5 | 5.7 | 1,271 | 8.0 | 6.0 | -85 |
| 25 to 29 | 861 | 5.4 | 4.1 | 934 | 5.9 | 4.8 | -73 |
| 30 to 34 | 717 | 4.5 | 4.8 | 658 | 4.1 | 5.1 | +59 |
| 35 to 39 | 735 | 4.6 | 5.9 | 733 | 4.6 | 6.5 | +1 |
| 40 to 44 | 879 | 5.5 | 7.2 | 953 | 6.0 | 8.0 | -74 |
| 45 to 49 | 1,089 | 6.9 | 7.8 | 1,141 | 7.2 | 8.4 | -52 |
| 50 to 54 | 1,176 | 7.4 | 7.8 | 1,202 | 7.6 | 7.1 | -27 |
| 55 to 59 | 1,135 | 7.2 | 6.9 | 1,101 | 6.9 | 6.7 | +33 |
| 60 to 64 | 943 | 6.0 | 5.9 | 936 | 5.9 | 5.2 | +7 |
| 65 to 69 | 881 | 5.6 | 5.0 | 822 | 5.2 | 3.9 | +59 |
| 70 to 74 | 770 | 4.9 | 3.7 | 710 | 4.5 | 3.1 | +59 |
| 75 to 79 | 662 | 4.2 | 2.9 | 555 | 3.5 | 2.6 | +107 |
| 80 to 84 | 546 | 3.4 | 2.4 | 424 | 2.7 | 1.6 | +121 |
| 85 and over | 648 | 4.1 | 2.9 | 636 | 4.0 | 3.0 | +11 |
| Total population | 15,841 | 100.0 | 100.0 | 15,906 | 100.0 | 100.0 | -66 |
Dominant groups
Analysis of the five year age groups of Cotham Ward in 2021 compared to Ashburton 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, 14.9% of the population was aged between 0 and 15, and 22.1% were aged 65 years and over, compared with 20.0% and 16.9% respectively for Ashburton.
The major differences between the age structure of Cotham Ward and Ashburton were:
- A larger percentage of persons aged 20 to 24 (7.5% compared to 5.7%)
- A smaller percentage of persons aged 5 to 9 (4.8% compared to 7.0%)
- A smaller percentage of persons aged 0 to 4 (3.3% compared to 5.2%)
- A smaller percentage of persons aged 40 to 44 (5.5% compared to 7.2%)
Emerging groups
From 2016 to 2021, Cotham Ward's population decreased by 65 people (0.4%). This represents an average annual population change of -0.08% per year over the period.
The largest changes in age structure in this area between 2016 and 2021 were in the age groups:
- 80 to 84 (+121 persons)
- 75 to 79 (+107 persons)
- 5 to 9 (-86 persons)
- 20 to 24 (-85 persons)
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