Korea has become one of the world's richest countries in the space of just a few decades, but when it comes to happiness Koreans still rank near the bottom of the list.
Korea scored six points out of 10 on the OECD Better Life Index 2014, placing it 25th among 36 member nations.
The index measures the happiness quotient of a nation based on 11 categories, including education, work and life balance and health. The average for the 36 nations came to 6.6.
The OECD cited Korea's propensity for working long hours for its low ranking. Koreans work an average of 40 hours a week, much higher than the OECD average of 34 hours a week.
Australia topped the happiness list, followed by Norway and Sweden.