Finland has ranked as the world’s happiest country for the ninth year in a row, according to the latest World Happiness Report , with Nordic nations continuing to dominate the top positions. The report, supported by the United Nations and compiled by researchers at the University of Oxford, places Iceland second and Denmark third, while Costa Rica rises to fourth place, marking its highest position to date. Sweden ranks fifth and Norway sixth, meaning all Nordic countries appear within the top ten. The ranking draws on survey data in which respondents assess their own lives on a scale from zero to ten.