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If someone in your family has Alzheimer's disease or another type of dementia, you are not alone. About 8 million Americans have some form of dementia. And many more have a family member or friend with the disease.

• Alzheimer's is the most common type of dementia. About half of people with dementia have this disease. That's about 4 million Americans.¹
• Dementia with Lewy bodies is the next most common type of dementia. Up to a quarter of people with dementia have this type. That's about 800,000 Americans.²
• Vascular dementia is the next most common type of dementia. It affects about 1.75 million Americans.³
• Other less common types of dementia include dementia due to alcohol abuse, head injury or a brain tumor.

The chances of getting dementia increase as you get older. About 1 in 20 people over the age of 65 have some form of dementia. This figure rises to about 1 in 5 people age 80 and over.⁴

The number of people affected by dementia is increasing because more people are living longer.