List of countries by life expectancy

This is a collection of lists of countries by average life expectancy at birth.

Life expectancy equals the average number of years a person born in a given country is expected to live if mortality rates at each age were to remain steady in the future. The life expectancy is shown separately for males and females, as well as a combined figure. Several non-sovereign entities are also included in this list too.

The figures reflect the quality of healthcare in the countries listed as well as other factors including ongoing wars, obesity, and HIV infections.

Worldwide, the average life expectancy at birth was 71.0 years (68 years and 6 months for males and 73 years and 6 months for females) over the period 2010–2013 according to United Nations World Population Prospects 2012 Revision, or 70.7 years (68.2 years for males and 73.2 years for females) for 2009 according to The World Factbook. According to the World Health Organization (WHO), women on average live longer than men in all countries, with the exception of Tonga.

The countries with the lowest overall life expectancies per the WHO are Sierra Leone, the Central African Republic, the Democratic Republic of the Congo, Guinea-Bissau, Lesotho, Somalia, Swaziland, Angola, Chad, Mali, Burundi, Cameroon, and Mozambique. Of those countries, only Lesotho, Swaziland, and Mozambique in 2011 were suffering from an HIV prevalence rate of greater than 10 percent in the 15–49 age group.

Comparing life expectancies from birth across countries can be problematic. There are differing definitions of live birth vs stillbirth even among more developed countries and less developed countries often have poor reporting.

Taiwan's data is not included in the following WHO statistics. According to the Ministry of the Interior of Taiwan, the life expectancy of the 23.5-million Taiwanese people reached 80.2 years in 2015, up from 79.84 years in 2014. The life expectancy of Taiwanese males averaged 77.01, while that of females reached 83.62, both of which were record highs.

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