Countries by IQ - Average IQ by Country 2024

Intelligence quotient (IQ) is a measure of human intelligence. People who want to have their IQ measured take standardized tests and receive a score that ranks their intelligence level. The higher one's IQ score, the more intelligent that person is considered to be.

IQ and Education: Two Sides of the Same Coin

IQ scores typically reflect the quality of education and resources available to people in their local geographic regions. Areas of the world with lower IQ scores are typically poorer and less developed, particularly in the area of education, compared to countries with higher IQ scores. Many researchers also use IQ to determine the smartest countries in the world. The IQ map above shades each country depending on how high the average IQ score in it is.

Which Country Has the Highest Average IQ?

According to a 2019 study by researchers Richard Lynn and David Becker at the Ulster Institute, the highest average IQ scores in the world belong to the Japanese, with the citizens of Taiwan and Singapore close behind. The top 10 list appears below, and the full rankings appear in the table further down this page.

Top 10 Countries with the Highest Average IQ - Ulster Institute 2019:*

*It bears mentioning that Lynn's studies, while comprehensive, tend to spark considerable debate.

As the data demonstrates, average IQ scores vary widely across the globe. Some researchers divide the world's countries into ranked categories based on their average IQ scores. These averages were obtained by starting with the country's average score in standard IQ tests (a common starting point), then fine-tuning those scores with additional measurements, such as national math, reading, and science assessments, while also factoring in the overall quality of the data.

Other Methods of Measuring Intelligence

However, it's important to remember that IQ isn't the only way to measure intelligence. There are many different ways to seek out the smartest countries in the world, and many of them have nothing to do with average IQ. For instance, it is possible to evaluate a country’s academic test scores, likelihood of "expanding the frontier of knowledge" and introducing new data technologies, or even the number of Nobel Prizes won.

Top 10 Smartest Countries Based on Students' Test Scores in Reading, Math and Science - OECD PISA 2018:

1. China - 555, 591, 590
2. Singapore - 549, 569, 551
3. Macau (China) - 525, 558, 544
4. Hong Kong (China) - 524, 551, 517
5. Estonia - 523, 523, 530
6. Canada - 520, 512, 518
7. Finland - 520, 507, 522
8. Ireland - 518, 500, 496
9. Korea - 514, 526, 519
10. Poland - 512, 516, 511

Top 10 Countries with the Highest Intelligence Capital Index - 2017:

1. United States - 74.88 (A+)
2. United Kingdom - 64.19 (A)
3. Germany - 64.18 (A)
4. Australia - 63.96 (A)
5. Singapore - 63.60 (A)
6. Sweden - 61.58 (A)
7. Switzerland - 61.57 (A)
8. Canada - 61.15 (A)
9. Finland - 60.45 (A)
10. Denmark - 60.25 (A)