Prevalence and incidence of dementia

The number of people living with dementia was estimated to be close to one million in 2021 (944,000), by 2050 this figure is expected to rise to 1.6 million.

Prevalence refers to the number of cases of dementia in a population at a particular time point, whereas incidence refers to the number of new cases in a population over a period of time.  The prevalence and incidence of dementia are dependent on many factors, such as age, gender, and geographical location. It can be difficult to be certain of these numbers due to the low diagnosis rate for dementia and the gradual onset of symptoms.

See our interactive maps which show the estimated number of people living with dementia in different parts of the UK based on published population and prevalence data.

prevalence, number, people, uk

Luengo-Fernandez, R. & Landeiro, F. (in preparation). The Economic Burden of Dementia in the UK.

prevalence projection uk 2023 people

Luengo-Fernandez, R. & Landeiro, F. (in preparation). The Economic Burden of Dementia in the UK.

prevalence number people 2050 projection

Luengo-Fernandez, R. & Landeiro, F. (in preparation). The Economic Burden of Dementia in the UK.

northern Ireland living with number prevalence

Raw Disease Prevalence in Northern Ireland 2022/23.

The number of people living with dementia in the UK will exceed 1.5 million by 2050

projections 2050 people number prevalence

Luengo-Fernandez, R. & Landeiro, F. (in preparation). The Economic Burden of Dementia in the UK.

Projections of the number of people with dementia, cancer, CHD and stroke in the UK up to 2050

conditions cancer stroke heart disease projections prevalence number

Luengo-Fernandez, R. & Landeiro, F. (in preparation). The Economic Burden of Dementia in the UK.

Global projections of dementia prevalence by geographic region

UK prevalence projection by 5 year age group to 2050