The nationality with the longest average life expectancy is not fixed in a single universal ranking, because it depends on the dataset and whether you mean countries, nationalities, men, or women. In current country-level rankings, Monaco appears at the top, while other sources highlight Hong Kong, Japan, Switzerland, Singapore, and South Korea among the longest-living populations.

Quick Scoop

  • Monaco is listed as the highest overall life expectancy in one major ranking, at about 89.4 years.
  • Hong Kong has also been reported as the highest in other rankings, at about 84.28 years.
  • Among larger national populations often cited for longevity, Japan, Singapore, Switzerland, and South Korea consistently rank near the top.

Why the answer varies

Different sources use different methods:

  • Some rank countries and territories rather than nationalities.
  • Some use latest available data , while others use older snapshots.
  • Some separate results by sex , which can change the leader.

Practical takeaway

If you want the simplest answer, say Monaco for the highest overall life expectancy in one widely cited ranking, or Hong Kong in another commonly referenced ranking. If you mean a broadly recognized nation-state with a long- lived population, Japan is one of the safest answers.

TL;DR: There isn’t one universally agreed “nationality” with the longest life expectancy, but Monaco and Hong Kong are the top names most often cited in recent rankings.