How the population changed in Test Valley: Census 2021

The English region with the largest population increase was the East of England, which grew by around 8.3% or 488,000 more residents. The English region with the smallest increase was the North East, growing by 1.9% or around 50,000 people. In Wales, the population grew by 1.4% or 44,000 people.

In Test Valley, the population size has increased by 12.1%, from around 116,400 in 2011 to 130,500 in 2021. This is higher than the overall increase for England (6.6%), where the population grew by nearly 3.5 million to 56,489,800.

Nearby areas like Basingstoke and Deane and Winchester have seen their populations increase by around 10.4% and 9.4%, respectively, while others such as West Berkshire saw a smaller increase (4.9%) and New Forest saw a decrease of 0.4%.

The largest population increases in the South East have been seen in Dartford and Milton Keynes, where the populations have grown by 20.0% and 15.3%, respectively.

At the other end of the scale, Gosport has seen a fall of 0.9%.

At 12.1%, Test Valley's population increase is higher than the increase for the South East (7.5%).

Tower Hamlets saw the largest percentage growth in population in England, increasing 22.1% between 2011 and 2021. Dartford was second, increasing 20.0%.

Some local authority areas have seen their populations decline. Kensington and Chelsea had an estimated population of 143,400 in 2021, which was around 15,200 fewer than in 2011 and a decrease of 9.6%.

The total population of local authority areas varies a lot, from Birmingham with around 1,144,900 people to the Isles of Scilly with around 2,100 people. The sizes of these circles are proportionate to the size of the population in each local authority area.

This population pyramid shows the population of males and females in each five-year age group at the time of the 2011 Census.
The largest age group in the South East back then was those aged 45 to 49 years.

More recently, in 2021, the largest age group in the South East was those aged 50 to 54 years.

In England, the largest age group in 2021 was people aged 30 to 34 years.

Overall, in England, there has been an increase of 20.1% in people aged 65 years and over, an increase of 3.6% in people aged 15 to 64 years, and an increase of 5.0% in children aged under 15 years.

This is how Test Valley compares. There has been an increase of 29.5% in people aged 65 years and over, an increase of 7.7% in people aged 15 to 64 years, and an increase of 9.2% in children aged under 15 years.

The places that have seen the largest increases in the population aged 65 years and over are Milton Keynes in the South East, which has seen 43.6% growth, and Harborough in the East Midlands (38.5%).

The places that have seen the largest increases in the population aged under 15 years are Dartford in Kent, where the size of this age group increased by 31.8% between 2011 and 2021, and Peterborough in the East of England (23.8%).

The places that have seen the largest percentage decrease in the number of children aged under 15 years are Westminster (19.4%) and Kensington and Chelsea (17.8%) in London and Richmondshire in Yorkshire (12.3%).