The longest-lived country averages 87 years per resident. The shortest is barely 53. The 34-year gap is one of the widest gaps in modern human geography.
How to Play: Guess if the country on the right has HIGHER or LOWER average life expectancy than the one on the left.
Name A
Name B
Top 10 Longest-Lived Countries
Life expectancy at birth measures how long an average newborn would live if mortality patterns stayed constant. Wealthy small countries (Monaco, Liechtenstein), high-income Asia (Japan, South Korea, Singapore), and Western Europe top the chart. Sub-Saharan Africa, beset by HIV/AIDS, malaria, and infant mortality, sits at the bottom.
| # | Name | Life Expectancy (years) | Unit |
|---|---|---|---|
| 1 | Monaco | 87 | years |
| 2 | Hong Kong | 85.50 | years |
| 3 | Japan | 84.50 | years |
| 4 | Switzerland | 84 | years |
| 5 | Singapore | 84 | years |
| 6 | South Korea | 83.50 | years |
| 7 | Italy | 83.50 | years |
| 8 | Spain | 83.50 | years |
| 9 | Australia | 83 | years |
| 10 | Iceland | 83 | years |
How Life Expectancy Is Calculated
Life expectancy at birth is computed from current age-specific mortality rates: it is the average number of years a newborn would live if those rates remained unchanged through their entire life. Countries with high infant mortality see life expectancy pulled down sharply, even if adults who survive childhood live to similar ages as elsewhere.
The Japanese case is striking. Japan’s life expectancy was 50 in 1947 and 84.5 by 2024 — one of the fastest gains ever recorded. Drivers include near-universal healthcare since 1961, very low obesity (~4% vs 42% in the US), and a traditional diet rich in fish and fermented foods.
The bottom of the list is dominated by central and southern African countries where HIV/AIDS, malaria, and conflict have suppressed life expectancy. Many have rebounded — South Africa rose from 53 in 2005 to 65 today as antiretroviral therapy became universal.
Frequently Asked Questions
Which country has the longest life expectancy?
Monaco at approximately 87 years. Hong Kong (85.5), Japan (84.5), and Switzerland (84) follow close behind.
Why is US life expectancy lower than Europe?
The US averages around 79 years, several years below most Western European countries. Causes include opioid overdoses, gun deaths, obesity, and uninsured-care gaps.
Has COVID changed life expectancy?
Yes — COVID-19 reduced average life expectancy in many countries by 1-2 years in 2020-2021. Most have since recovered, but some (US, Russia) remain below pre-pandemic levels.
Why do African countries rank lowest?
High infant mortality, infectious disease (HIV/AIDS, malaria), and conflict are the main drivers. Adults who survive childhood often live to ages similar to global averages.
Note: Life expectancy at birth in years per WHO and UN World Population Prospects 2024 estimates.
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