Average IQ Score by Country (2025)
Comprehensive ranking of 40 countries based on standardized cognitive assessments and psychometric research. The global average IQ is 100 by definition.
40
Countries ranked
106.5 (Japan)
Highest avg IQ
100
Global average
Methodology & Sources
The data presented here is aggregated from multiple large-scale psychometric studies, including research based on the Raven's Progressive Matrices, the Stanford-Binet Intelligence Scale, and the Wechsler Adult Intelligence Scale (WAIS).
IQ scores are normalized so that the global mean equals 100 with a standard deviation of 15. Country averages reflect performance across representative population samples and should be interpreted as statistical estimates rather than fixed values.
Factors influencing national averages include education quality, nutrition, healthcare access, and socioeconomic conditions — not intrinsic cognitive differences between populations.
Frequently Asked Questions
What is the average IQ worldwide?
By definition, the global average IQ is 100 with a standard deviation of 15. This means approximately 68% of the population scores between 85 and 115.
Which country has the highest average IQ?
Japan, Taiwan, Singapore, and Hong Kong consistently rank highest, with average IQ scores around 105–107 in multiple large-scale studies.
What is a good IQ score?
An IQ score of 100 is exactly average. Scores above 115 are considered above average (top 16%), above 130 is gifted (top 2%), and above 145 is exceptionally gifted (top 0.1%).
How can I measure my own IQ?
You can take our free online IQ test — 35 scientifically-designed questions based on Stanford-Binet methodology. Results are available instantly, no registration required.
How does your IQ compare?
Take our free IQ test and see where you rank — globally and by country.
Take the Free IQ Test