Each of the 163 countries in the index was graded according to variables including life expectancy, causes of death and health risks ranging from high blood pressure and tobacco use to malnutrition and the access to clean water.
The index shows that a child born in Italy has a life expectancy of 80 years compared to 52 years in countries such as Sierra Leone.
Trailing behind Italy in the rankings are Iceland, Switzerland, Singapore and Australia, while the United States ranked 34th.
According to the survey, much of the secret of Italians' health lies in their internationally renowned Mediterranean diet, which is characterised by fresh fruit and vegetables, lean meat and fish, and healthy amounts of olive oil.
Despite stagnant growth and high unemployment, the survey indicates that Italians are much healthier than Canadians, Americans and Britons, who have higher blood pressure and cholesterol levels, as well as a higher prevalence of mental health issues.
Following the release of the index, Italian Health Minister Beatrice Lorenzin stated that diet, lifestyle and the national health service played a significant role in Italy's top position.
With ANSA