2. United States
The United States has one of the largest centenarian populations in absolute numbers, mainly due to its large population size. Advances in medical technology, improved treatments for heart disease and cancer, and better management of chronic conditions allow more people to survive into very old age. While lifestyles vary widely, many American centenarians share common traits such as lifelong activity, strong family support, and access to specialized healthcare. Coastal states and urban areas tend to report higher concentrations of people living beyond 100.
