Average IQ statistics by country are among the most searched β and most misunderstood β data points in cognitive science. Raw national IQ numbers tell only part of the story. Education quality, economic development, test design, language barriers, cultural context, and sample methodology all shape how these figures are collected and what they actually mean.
Our IQ by Country articles take a responsible, nuanced approach to this data. Rather than presenting league tables without context, each article explains the factors that drive regional differences, the limitations of cross-national comparisons, and what the numbers can and cannot tell us about human intelligence at scale.
Browse the articles below to explore specific regions and countries. To understand how your own score compares globally, take our International Standard IQ Test for a research-backed cognitive assessment.
Australia's average IQ is ~102β104, above average globally. But PISA scores have declined long-term since 2000, and skilled migration boosts the estimate. This guide explains the full picture.
The UK is the reference point for all national IQ comparisons β set at IQ 100. But UK scores show signs of plateau and decline among top performers. This guide covers the data, regions, and trends.
India's estimated average IQ is ~76β82 β yet it produces world-class engineers and scientists. This guide explains the elite-population paradox, India's education divide, and what drives the numbers.
Vietnam scores 468 on PISA β higher than many wealthy OECD nations. But IQ estimates range wildly from 78 to 102. This guide explains the data conflict and what Vietnam's case reveals about intelligence.
China's estimated average IQ is ~104β106 β but the data has a major complication: most international tests sample urban China, not rural. This guide explains what the numbers actually show.
Japan consistently ranks #1 in global IQ estimates at ~106. But what does this mean? This guide covers the data, the methodology debate, Japan's education system, and what PISA scores actually show.
Explore average IQ patterns across Asia and learn how education, culture, language, and testing context influence IQ scores and their interpretation.
Is national IQ a reliable way to compare countries? Learn its limitations, data issues, cultural bias, and why IQ averages require careful interpretation.
Explore average IQ patterns across Europe by region. Learn what these statistics mean, what influences them, and how to interpret regional IQ data responsibly.
What is the average IQ in the United States? Learn what IQ scores measure, why the national average is around 100, and how to interpret these numbers responsibly.
National IQ data is one piece of a much larger picture. Explore related topics to build a fuller understanding of intelligence: