World Happiness Report Releases List of Happiest Countries in the World The report ranks 156 countries on their happiness levels using data from Gallup World Poll surveys. The people who were polled were asked to rank their best possible life on a 0-10 scale, followed by ranking their current life on a 0-10 scale. There are also sub-bars that breakdown the data even further, based on life-expectancy, freedom, social support and more. These are the five happiest countries in the world, according to the report: 5. Switzerland 4. Iceland 3. Denmark 2. Norway 1. Finland