Dementia Statistics UK: The Definitive Guide (2026)

The UK's Biggest Killer

In 2024, dementia killed more people in the UK than any other condition. According to analysis by Alzheimer's Research UK, 76,894 people died from dementia in 2024 — more than 1 in 10 of all deaths in the UK (11.8%). More than from heart disease. More than from stroke. And unlike those conditions, where death rates have been falling, the dementia death toll is rising year on year.

Key Facts & Figures (Overview)

• 982,000 people in the UK were living with dementia in 2024 — close to 1 million (Dementia Statistics Hub)
• Projected to rise to over 1 million by 2030, over 1.4 million by 2040, and over 1.6 million by 2050
• 76,894 people died from dementia in the UK in 2024 — up from 75,393 in 2023 (Alzheimer's Research UK, December 2025)
• 11.8% of all UK deaths in 2024 were due to dementia — the single largest cause of death
• Dementia has been the leading cause of death for UK women since 2011 — in 2024: 48,915 women vs 27,979 men
• Approximately 1 in 11 people over 65 are living with dementia
• Around 40% of people aged 65+ thought to be living with dementia do not have a formal diagnosis
• In England, 483,000 people had a formal dementia diagnosis by December 2024 — a record high
• 34,033 (6.9% of formally diagnosed) received their diagnosis before age 65 — young-onset dementia
• 70% of care home residents are estimated to have dementia or severe memory problems (Alzheimer's Society)
• An estimated 169,500 people with a formal dementia diagnosis live in care homes in England — approximately 34% of those diagnosed
• Dementia costs the UK economy £42 billion per year — encompassing NHS costs, social care costs, and unpaid care
• Families bear 63% of the total cost of dementia
• Alzheimer's disease accounts for approximately 60–70% of all dementia cases
• The diagnosis rate in England is 65.4% — approximately 35% of people with dementia remain undiagnosed
• The count of people with dementia has grown 9.6% since 2020 — faster than the 7.6% growth in available care home beds

What Is Dementia?

Dementia is an umbrella term for a group of symptoms affecting memory, thinking, problem-solving, language, and behaviour — caused by damage to the brain, typically progressive. The main types are:

Alzheimer's disease (60–70% of cases): Characterised by amyloid plaques and tau tangles.

Vascular dementia (approximately 20% of cases): Results from reduced blood supply to the brain — caused by strokes, TIAs, or small vessel disease.

Lewy body dementia (approximately 10–15%): Involves abnormal protein deposits, associated with Parkinson's-like symptoms and fluctuating cognition.

Frontotemporal dementia (FTD): Less common overall but disproportionately affects younger people — the most common form of young-onset dementia.

The Diagnosis Gap

Approximately 40% of people over 65 thought to be living with dementia do not have a formal diagnosis. People without a diagnosis cannot access dementia-specific support services, care coordination, or advance care planning. Their families and carers do not receive the information or financial support available to those with a formal diagnosis.

Alzheimer's Research UK's "Dementia Unseen" campaign calls for ambitious reform to improve early and accurate diagnosis rates, describing it as "a right — for everyone."

Dementia in Care Homes

• 70% of care home residents are estimated to have dementia or severe memory problems
• 169,500 people with a formal dementia diagnosis live in care homes in England — 34% of all formally diagnosed
• The number of people with dementia has grown 9.6% since 2020 — faster than the 7.6% growth in care home beds

For care workers, managers, and organisations providing care to people with dementia, awareness training is essential. Every person working in a care environment encounters people with dementia.

Young-Onset Dementia

There are approximately 34,033 people under 65 with a recorded dementia diagnosis in England; the true UK-wide figure (including undiagnosed) is estimated at approximately 70,000. Young people with dementia are more likely to be in employment when symptoms develop, more likely to have dependent children, and less likely to receive appropriate support — since services are typically designed around older people.

The Cost of Dementia

The economic cost of dementia in the UK is estimated at £42 billion per year:

• NHS costs: Approximately £4.3 billion
• Social care costs: Approximately £11.6 billion
• Unpaid care by family members: Approximately £25.4 billion — by far the largest component

Families bear 63% of the total cost. As the number of people with dementia rises toward 1.4 million by 2040, this financial model is increasingly unsustainable.

Written by CPD Experts

This guide was produced by the team at Online CPD Academy, a UK provider of CPD-accredited online training courses. Our dementia awareness training is designed for care workers, healthcare professionals, and anyone who works with older people.

Sources & References

• Alzheimer's Research UK – Dementia Is Still UK's Biggest Killer (December 2025) – https://www.alzheimersresearchuk.org/news/dementia-is-still-uks-biggest-killer-where-do-we-go-from-here/
• Dementia Statistics Hub – Prevalence and Incidence – https://dementiastatistics.org/about-dementia/prevalence-and-incidence/
• Dementia Statistics Hub – Diagnosis – https://dementiastatistics.org/about-dementia/diagnosis/
• NHS England Digital – Primary Care Dementia Data, January 2025 – https://digital.nhs.uk/data-and-information/publications/statistical/primary-care-dementia-data/january-2025
• Gov.UK – Dementia Profile: Prevalence and Supporting Well Topics, March 2025 – https://www.gov.uk/government/statistics/dementia-profile-march-2025-update/dementia-profile-prevalence-and-supporting-well-topics-statistical-commentary-march-2025
• Nuffield Trust – Dementia Care in Primary and Secondary Care in England – https://www.nuffieldtrust.org.uk/resource/dementia-care-in-primary-and-secondary-care-in-england