Los Alamos, home of Los Alamos National Laboratory, historically has found itself on top of lists that highlight affluence, such as rankings of median or per-capita income or density of millionaires.
And income helps when it comes to longevity, says the study by researchers at the University of Wisconsin.
Los Alamos contrasts with Sioux County, N.D., the least healthy place in the United States for the second consecutive year, according to the research.
Sioux County, headquarters of the Standing Rock Sioux Nation, which covers about 1 million acres in North and South Dakota, has the highest rate of premature deaths in the nation, the study found.
The county loses almost 24 years of potential life per 100 residents, compared with fewer than three years lost per 100 in Los Alamos.