The World Happiness Report shows Ireland slipping in the ranks falling from 13th in 2022 to 14th last year and now 17th, according to a global survey.
Finland retains its place as the happiest country in the world.
The index is based on each surveyed individual’s own subjective evaluation.
Those under 30 are the unhappiest in Ireland and rank 21st happiest in the world; the happiest cohort in Ireland are those between 45 and 59 (16th in the world).
The top 10 happiest nations are made up of Finland, Denmark, Iceland, Sweden, Israel, Netherlands, Norway, Luxembourg, Switzerland and Australia.
Afghanistan remains the most unhappy country in the world with Lesotho and Lebanon the second- and third-worst respectively.
The report is compiled from the Gallup World Poll, which surveys around 1,000 people in each country and asks them to rank themselves from 0 (most unhappy) to 10. GDP per capita, life expectations, social supports and freedom to make life choices were also factored into the global survey.