Average IQ in United States: Estimates & Context
Estimated Avg IQ
~98
Rank in This Dataset
#29
of 50 countries covered
Region
North America
Important note: National average IQ scores are estimates based on limited sample sizes and vary across studies. These figures are heavily influenced by socioeconomic factors, access to quality education, healthcare, nutrition, and testing conditions. They do not reflect the intelligence or potential of any individual from that country. IQ scores measure specific cognitive skills and should be interpreted within their proper scientific context.
Where These Numbers Come From — and Why They're Debated
There is no official global IQ census. National IQ figures like the one above come from compiled cross-national datasets — most famously the compilations begun by Richard Lynn and Tatu Vanhanen (IQ and the Wealth of Nations, 2002) and successor datasets, alongside alternative estimates derived from international student assessments such as PISA and TIMSS. These compilations are heavily debated in the academic literature: critics have documented small and unrepresentative samples for many countries, scores extrapolated from neighboring nations, mixing of different tests and decades, and translation and cultural-fit problems. Different datasets can shift a country's estimate — and its rank — by several points.
For these reasons, the figure for United States should be read as a rough estimate of average performance on Western-style cognitive tests under the conditions in which the underlying samples were collected — not as a measure of the innate ability or potential of United States's people. Population-level test averages track education access, childhood nutrition, health, and economic development, and they change as those conditions change (see the Flynn Effect below).
Education System in United States
The United States has a highly decentralized education system with significant variation across its 50 states and 13,000+ school districts. The country is home to the world's most prestigious universities and leads in research output, yet K-12 education quality varies dramatically by zip code. The US spends more per student than almost any other country but achieves middling results on PISA. Significant achievement gaps exist along racial, ethnic, and socioeconomic lines.
To understand what IQ scores measure and how they're calculated, see our guide on what IQ is. For a breakdown of what different score levels mean, visit our IQ score ranges page.
United States Compared to North America
Here is how United States compares to other countries in North America that are included in our database:
| Country | Average IQ | Global Rank |
|---|---|---|
| United States | 98 | #29 |
| Canada | 99 | #22 |
| Mexico | 87 | #106 |
Countries with Similar Rankings
These countries have similar average IQ scores and global rankings to United States:
| Country | Average IQ | Global Rank | Region |
|---|---|---|---|
| Belgium | 100 | #19 | Europe |
| Canada | 99 | #22 | North America |
| Australia | 99 | #23 | Oceania |
| Sweden | 99 | #24 | Europe |
| Norway | 99 | #25 | Europe |
Understanding IQ Distribution
It's crucial to remember that national averages represent the middle of a wide distribution. Within every country, individual IQ scores span the full range from below 70 to above 130 and beyond. A country with an average IQ of 98 will have many individuals scoring well above and below that number. Factors like socioeconomic status, nutrition, education quality, and access to healthcare play significant roles in cognitive development and test performance.
The Flynn Effect — the observation that IQ scores have risen substantially over time in many countries — suggests that environmental improvements like better nutrition, healthcare, and education access can significantly impact cognitive test performance at the population level. Many developing nations are experiencing rapid improvements in these areas.
Frequently Asked Questions
What is the average IQ in the United States?
The US average IQ is estimated at 98, ranking #29 globally. This slightly below-average score for a wealthy nation reflects the country's vast size, diversity, and significant inequality in educational access.
Why doesn't the US score higher given its wealth?
The US has extreme variation in education quality, with some of the world's best schools alongside severely underfunded ones. High child poverty rates, healthcare inequality, and large achievement gaps across demographic groups all contribute to a national average that does not reflect the country's peak performance.
How does the US compare to Canada?
The US (98) scores slightly below Canada (99). Canada's more equitable school funding, universal healthcare, and lower child poverty rates likely contribute to its slightly higher and more uniform cognitive outcomes.
Explore More Countries
See the full list of all countries on our Average IQ by Country page, or take our free IQ test to see how you compare.