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Dementia Statistics
Dementia remains one of the greatest health and social care issues facing England and the wider UK and is a particular challenge in our local area comprising Chichester, Bognor Regis and Littlehampton, and Arundel and South Downs.
As people are living longer and the population continues to age, the number of individuals affected by the condition is expected to rise.
Explore the key facts and statistics below to understand its growing impact.
Local Stats
& Facts*
There are over 19,350 (estimated) living with dementia in West Sussex alone.
Explore more of the key statistics and facts that highlight the health and wellbeing challenges facing our local area.
Chichester Statistics:
Chichester has a 46% higher prevalence than the national average.
13th highest number of dementia cases in the UK
Bognor & Littlehampton Statistics:
Bognor & Littlehampton has a 52% higher prevalence than the national average.
7th highest number of dementia cases
in the UK
Southdowns & Arundel Statistics:
Southdowns & Arundel has a 46% higher prevalence than the national average.
12th highest number of dementia cases in the UK
UK Stats & Facts*
500,000+ have a formal dementia diagnosis
In 2025, the number of people formally diagnosed with dementia exceeded half a million, reflecting the increasing prevalence of the condition across the UK.
982,000 estimated to be living with dementia
With the diagnosis of dementia being around 62% in 2022, it is estimated that 982,000 are living with dementia across the UK
1,400,000 to have dementia by 2040
It is estimated that by 2040, 1.4 million people will be living with dementia across the UK.
1 in 2 will be affected by dementia in their lifetime
1 in 14 people over the age of 65 have dementia
1 in 6 over the age
of 80 develop
dementia
Economic Impact*
The global cost of dementia rose by
62%
between 2010 - 2019
It's estimated that dementia cost the UK £42.5 billion in 2024, by 2040 it is expected to cost £90 billion
In estimated
461 million hours of unpaid dementia care were provided in 2018
In 2024 alone, an estimated sum of £21.1 billion
of informal care
was given
Dementia type breakdown*
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Early Onset Dementia*
Over 70,800 people are thought to be living with early onset dementia across the UK
More than 19,000 are believed
to be undiagnosed and without support
Do you need some extra support?
Delivered by the team at Sage House, Dementia Supporter training helps individuals and families, community organisations and professionals develop a deeper understanding of dementia and build confidence in supporting those affected by it.
Our 45-minute sessions are adapted to suit the needs of each audience, providing practical knowledge, guidance and tools to help participants offer meaningful support to others.