List of U.S. counties with longest life expectancy

As of my last knowledge update in October 2021, there may not be a definitive national list of U.S. counties ranked by life expectancy. However, data from sources such as the CDC's National Center for Health Statistics and the Robert Wood Johnson Foundation often highlight counties with the highest life expectancies. Typically, counties with the longest life expectancies tend to be found in states like California, Massachusetts, and Hawaii.