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Data on Dementia

Data on Dementia

Alzheimer’s disease and Related Dementia Population Estimates

The following interactive views detail the estimated number of older individuals living with Alzheimer’s disease or related dementias. The population estimates were calculated by taking prevalence rates from peer-reviewed academic articles and applying them to census data taken from the American Community Survey. The top of each view details the type of dementia being addressed (Alzheimer’s disease, related dementias, or both), the demographic topic (age group, sex, or race), and the prevalence rates for each demographic sub-group. Just below the details are the available filters to refine the views. Be cognizant of what each filter is set to; it can be easy to misread the estimates due to a mistakenly set filter. Finally, the citation for the specific article used is listed at the bottom of each view.

The age and sex views are read similarly – each year’s estimates are a snapshot of the estimated number of people living with Alzheimer’s or related dementia. The map allows the user to see prevalence rates down the county level and hovering over individual counties give incidence rates as well (new cases per year). 

Quick Facts

  • There is an estimated 140,000 people in Georgia with Alzheimer’s
  • More than 5 million Americans are living with Alzheimer’s
  • 1 in 10 people age 65 and over have Alzheimer’s
  • More than 15 million Americans provide unpaid care for people with dementia
  • In 2017, dementia will cost the United States an estimated $259 billion

For more facts on Alzheimer’s and related dementias, check out the Alzheimer’s Association’s Fact Sheets.




The view detailing dementia rates by race is read quite different than the age and sex views. Instead of showing prevalence rates per year, it shows the expected number of people for each race that may develop dementia in the next 25 years. This allows for a unique view of expected number of individuals that may develop dementia in the upcoming two decades helping forecast where there may be a greater need for resources.