Dementia is an umbrella syndrome rather than one disease. These 55 dementia statistics describe its worldwide scale, U.S. diagnosed prevalence, modeled future burden, mortality, caregiving and costs while distinguishing Alzheimer disease from dementia overall and estimates from observed counts.
Key Dementia Statistics
The most broadly useful figures include:
- In 2021, 57 million people worldwide were estimated to be living with dementia.
- In 2021, more than 60% of people living with dementia were in low- and middle-income countries.
- Nearly 10 million new dementia cases occur worldwide each year according to a WHO estimate.
- Alzheimer disease may account for 60%–70% of dementia cases worldwide in the current WHO estimate.
- In 2022, 4.0% of U.S. adults aged 65 and older had diagnosed dementia.
- In 2022, diagnosed dementia affected 13.1% of U.S. adults aged 85 and older.
- In 2022, diagnosed dementia was 6.6% among non-Hispanic Black U.S. adults aged 65 and older.
- In 2019, a Global Burden of Disease analysis estimated 57.4 million dementia cases worldwide.
- The same analysis projected 152.8 million people living with dementia worldwide in 2050.
- From 2019 to 2050, modeled global dementia cases were projected to rise by 166%.
- From 2019 to 2050, the largest projected regional increase was 367% in north Africa and the Middle East.
- The United States recorded 116,022 Alzheimer disease deaths in 2024.
- Global dementia costs were estimated at US$1.3 trillion in 2019.
- In 2024, nearly 12 million U.S. family and friend caregivers provided unpaid dementia care.
- U.S. unpaid dementia caregivers provided 19 billion hours of care in 2024.
- The estimated economic value of U.S. unpaid dementia care was $413.4 billion in 2024.
- U.S. Alzheimer disease and related dementia care costs were projected at $384 billion in 2025.
- Families bore 70% of the estimated U.S. lifetime cost of dementia care in 2024 through unpaid care and out-of-pocket expenses.
Contents
- Global dementia prevalence, incidence and affected populations
- U.S. dementia statistics by age, sex and socioeconomic characteristics
- Dementia data across regions and population groups
- Dementia trends and 2050 projections
- Dementia mortality statistics and changing death patterns
- Dementia caregiving, costs and health-system data
Global Dementia Prevalence, Incidence and Affected Populations
The World Health Organization estimated that 57 million people were living with dementia worldwide in 2021. More than 60% lived in low- and middle-income countries, and nearly 10 million new cases occurred globally each year; these are rounded estimates, not a registry census. WHO, “Dementia”
- Alzheimer disease may contribute 60%–70% of dementia cases worldwide in the WHO’s current estimate, but this is an attributable range rather than a directly counted global registry result.
- Women provide about 70% of care hours for people living with dementia worldwide, a caregiving measure that should not be confused with the sex distribution of people with dementia.
- Informal carers supplied about 50% of the estimated US$1.3 trillion global economic cost of dementia in 2019; the valuation includes unpaid care and depends on costing assumptions. WHO, “Dementia”
A systematic review of community-dwelling adults aged 60 and older, covering studies through 2015, produced pooled estimates rather than a current national rate. Its point prevalence was 48.62 cases per 1,000 people, with a 95% confidence interval of 41.98–56.32 per 1,000; annual period prevalence was 69.07 per 1,000, with a 95% confidence interval of 52.36–91.11.
Definitions varied across the included studies. The Prevalence and Incidence of Dementia: a Systematic Review and Meta-analysis
U.S. Dementia Statistics by Age, Sex and Socioeconomic Characteristics
The CDC’s National Health Interview Survey measured diagnosed dementia among U.S. adults aged 65 and older in 2022. The overall estimate was 4.0%, with a 95% confidence interval of 3.5%–4.6%; because it measures diagnosis, it may miss undiagnosed disease. CDC, “Dementia in Adults Aged 65 and Over: United States, 2022”
| U.S. population, 2022 | Diagnosed dementia |
|---|---|
| Age 65–74 | 1.7% |
| Age 75–84 | 5.7% |
| Age 85+ | 13.1% |
| Men aged 65+ | 3.8% |
| Women aged 65+ | 4.2% |
The age gradient is pronounced: the survey estimated diagnosed dementia at 1.7% for adults aged 65–74, 5.7% for those aged 75–84 and 13.1% for those aged 85 and older. The corresponding 95% confidence intervals were 1.2%–2.2%, 4.6%–7.0% and 10.4%–16.1%, respectively. CDC, “Dementia in Adults Aged 65 and Over: United States, 2022”
- The 2022 diagnosed-dementia estimate was 3.8% among U.S. men aged 65 and older, compared with 4.2% among women; the reported 95% confidence intervals were 3.1%–4.6% and 3.5%–5.1%.
- By survey race and ethnicity categories, diagnosed dementia was estimated at 3.9% for non-Hispanic White adults, 6.6% for non-Hispanic Black adults and 4.1% for Hispanic adults aged 65 and older.
- Diagnosed dementia was 6.1% among adults aged 65 and older with less than a high-school education, compared with 2.5% among those with a bachelor’s degree or higher.
- The estimate was 6.8% among adults below 100% of the federal poverty level and 2.8% among adults at or above 400% of that threshold.
These education and income comparisons are descriptive survey associations, not proof of causation. Income categories do not measure lifetime wealth or care access, and Hispanic origin and race are classified separately in the CDC survey. CDC, “Dementia in Adults Aged 65 and Over: United States, 2022”
Dementia Data Across Regions and Population Groups
A Global Burden of Disease Study 2019 analysis estimated 57.4 million dementia cases worldwide in 2019, with a 95% uncertainty interval of 50.4–65.1 million. Its modeled global female-to-male ratio was 1.69, with a 95% uncertainty interval of 1.64–1.73; this is model uncertainty, not a sampling confidence interval. GBD 2019 analysis
| Measure | Estimate | Scope and period |
|---|---|---|
| Dementia cases | 57.4 million | Worldwide, 2019 |
| Female-to-male ratio | 1.69 | Worldwide, 2019 |
| Female-to-male ratio | 1.67 | Worldwide, 2050 forecast |
| 2050 ratio uncertainty interval | 1.52–1.85 | Worldwide forecast |
The same study projected a 2050 female-to-male dementia ratio of 1.67, with a 95% uncertainty interval of 1.52–1.85. The result depends on demographic and risk-factor assumptions, so it is not an observed future outcome. GBD 2019 analysis
Regional forecasts also differ substantially. From 2019 to 2050, projected case growth was 53% in high-income Asia Pacific, 74% in western Europe, 367% in north Africa and the Middle East, and 357% in eastern sub-Saharan Africa.
The reported uncertainty intervals were 41%–67%, 58%–90%, 329%–403% and 323%–395%, respectively. GBD 2019 analysis
Dementia Trends and 2050 Prevalence Projections
The GBD model projected 152.8 million people living with dementia worldwide in 2050, compared with 57.4 million modeled cases in 2019. The 2050 forecast has a 95% uncertainty interval of 130.8–175.9 million, and projected counts should not be presented as observed totals. GBD 2019 analysis
- The study’s two modeled point estimates correspond to a projected 166% increase in global cases from 2019 to 2050; forecast uncertainty applies.
- Global age-standardized dementia prevalence was projected to remain nearly stable over 2019–2050, with a modeled change of 0.1% and a 95% uncertainty interval of −7.5% to 10.8%.
- The smallest projected regional case increase was 53% in high-income Asia Pacific, with a 95% uncertainty interval of 41%–67%.
- The largest projected regional case increase was 367% in north Africa and the Middle East, with a 95% uncertainty interval of 329%–403%.
The contrast between nearly stable age-standardized prevalence and sharply rising case counts reflects the model’s population and aging assumptions. It describes a forecast of burden, not a guarantee about treatment, prevention or future diagnosis. GBD 2019 analysis
Dementia Mortality Statistics and Changing Death Patterns
The United States recorded 116,022 Alzheimer disease deaths in 2024 in the National Vital Statistics System. Alzheimer disease is narrower than all dementia, so this underlying-cause count should not be relabeled as total dementia mortality. CDC, “FastStats – Deaths and Mortality”
- U.S. Alzheimer disease deaths increased 142% between 2000 and 2022, while U.S. heart disease deaths decreased 2.1% over the same period.
- Alzheimer disease ranked as the sixth-leading cause of death among U.S. adults aged 65 and older in 2022.
The 2000–2022 comparison uses cause-of-death counts and is not age-standardized in the supplied summary. The ranking likewise concerns Alzheimer disease, not dementia as an undifferentiated syndrome. 2025 Alzheimer’s Disease Facts and Figures
A historical Medicare decedent study illustrates how costs can accumulate near the end of life. Among 1,702 fee-for-service beneficiaries aged 70 and older using 2005–2007 data, mean Medicaid spending in the last five years of life was $35,346 for people who died with dementia and $4,552 for those who died without dementia. NIA, “Health care costs for dementia found greater than for any other disease”
In that dementia group, Medicaid enrollment was 21% at the study baseline and reached 27% during the final five years of life. These are historical cohort measures and should not be treated as current prices or as estimates of all U.S. dementia costs. NIA, “Health care costs for dementia found greater than for any other disease”
Dementia Caregiving, Costs and Health-System Data
The WHO estimated global dementia costs at US$1.3 trillion in 2019, including medical, social and informal-care costs. Informal carers accounted for about half of that economic cost, but the valuation depends on how unpaid care is priced. WHO, “Dementia”
U.S. figures use different populations and methods, so they are not interchangeable with the global estimate. The 2025 Alzheimer’s Disease Facts and Figures projected $384 billion in U.S. Alzheimer disease and related dementia care costs for 2025 and nearly $1 trillion in 2050 under a counterfactual assumption of no new treatments or care advances. 2025 Alzheimer’s Disease Facts and Figures
| U.S. caregiving or cost measure | Figure | Period or definition |
|---|---|---|
| Family and friend caregivers | Nearly 12 million | 2024, unpaid care |
| Unpaid care hours | 19 billion | 2024 |
| Economic value of unpaid care | $413.4 billion | 2024, replacement-cost valuation |
| Estimated lifetime cost per person | $405,262 | 2024 dollars |
| Family share of lifetime cost | 70% | 2024 estimate |
Nearly 12 million U.S. family and friend caregivers provided unpaid dementia care in 2024, totaling an estimated 19 billion hours. The estimated economic value was $413.4 billion, using replacement-cost valuation rather than wages actually paid to families. 2025 Alzheimer’s Disease Facts and Figures
- The estimated lifetime cost of caring for one person with dementia was $405,262 in 2024 dollars, combining care categories in a model rather than representing a bill paid by every family.
- Families bore 70% of that estimated lifetime cost through unpaid care and out-of-pocket expenses; the share includes imputed unpaid care.
- Among employed dementia caregivers, 57% reported going in late, leaving early or taking time off because of caregiving, and 16% reported taking a leave of absence.
- An estimated 34%–59% of U.S. adults aged 65 and older lived in areas with potential dementia specialist shortfalls in a 2025 report; the range reflects alternative accessibility analyses.
A nationally representative decedent analysis using 2004–2015 data found that community-dwelling people with dementia and their families paid 64% of total care costs on average. For nursing-home decedents, the corresponding share was 43%; the analysis included 2,909 decedents aged 72 and older with continuous fee-for-service Medicare, and the family share included estimated informal care. NIA, “People with dementia and their families disproportionally handle costs of care”
These setting-specific percentages are historical observational results, and residential groups may differ in health and resources. Together with the caregiver estimates, they show why dementia statistics should identify the period, setting, population and whether unpaid care has been assigned an economic value.