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Census 2021: How do official population figures compare to estimates?

We now have more robust figures on the size and characteristics of Teignbridge’s population.

But how do they compare to estimates which are used by decision makers in central and local government to understand their communities’ needs?

Mid-year population estimates are produced annually by the Office for National Statistics and are based on the most recent census.

The ONS rolls forward information from registers for births, deaths and migration surveys to produce each year’s estimate – but it means the further away from the census, the more uncertain they are.

ONS statisticians estimated there were 135,039 people of all ages living in Teignbridge as of mid-2020 – broadly in line with the 2021 census figure of 134,800.

Snapshot data from the census in March 2021 tells us there were 36,500 (27.1%) over-65s living in the area, showing little difference to the 36,263 (26.9%) estimated by the ONS.

There are more males in Teignbridge than estimated by the ONS – 2021 census results revealed 65,300 males (48.4%) were usual residents, while the mid-2020 prediction was 65,233 (48.3%).

The latest estimates suggested there were 69,806 (51.7%) females in the area, and on census day, 69,500 (51.6%) said Teignbridge was their home.

The ONS says population statistics are “vital in making a range of decisions and informing public debate”.

During the coronavirus pandemic, estimates have been used to measure vaccine uptake at a national and regional level, while they are also used to measure unemployment rates, forecast pensions and make decisions about local services – such as the number of school places of the provision of health services for an ageing population.

The 2020 mid-year population estimate for England and Wales as a whole stood at 59.7 million – very close to the 2021 census figure of 59.6 million.

The ONS noted that population change in certain areas “may reflect how the coronavirus pandemic affected people’s choice of usual residence on census day”.

“These changes might have been temporary for some and more long-lasting for others,” it added.

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