The survey showed that in Spain people become more miserable as they grow older, unlike Nordic countries where people tend to grow happier with age.
Spaniards aged between 16 and 24 years old rated their satisfaction with their lives on average 7.4 out of 10 while the oldest demographic surveyed, those over 75 years old, rated their lives on average 6.4.
Overall, Spaniards rated their life satisfaction to be at 6.9 – slightly lower than the European average of 7.1.
Eurostat's EU-wide survey on life satisfaction showed that in general, Nordic countries tended to be the happiest, with Sweden, Finland and Denmark all rating their satisfaction to be on average 8.0 out of 10.
"Some people say that the 46th year of life is a global low point for happiness," Happiness Research Institute CEO Meik Wiking told The Local. "One explanation for this could of course be that this is a time when we are pressured both from our career and by our children.
"Another explanation is that this might be the time of life when we must come to terms with the fact that we are just like everyone else – we're not going to be big movie stars or football players and that might be hard to swallow for some.”
The least happy countries were Bulgaria, with an average life satisfaction of 4.8, just below Serbia at 4.9.