— National IQ research
Average IQ in Iran
Estimated avg IQ
84
Percentile
14th
Region
Middle East
vs world avg (82)
2 points above
Published cross-national IQ research places Iran at an estimated national average IQ of around 84. This is a population mean estimate with wide confidence intervals — not a fixed number.
Iran has strong educational traditions, particularly in mathematics and science, and IQ estimates vary considerably across studies.
Important caveats about national IQ averages
National IQ averages are widely cited but require careful interpretation:
- Within-country variation is enormous — typically 15-20 IQ points of standard deviation within any country, far larger than differences between countries
- Education and nutrition access are the strongest predictors of national average IQ — countries with better early childhood nutrition and schooling score higher
- Urban vs. rural gaps can be 10-15 points within the same country
- Measurement bias is real — tests developed in Western contexts may not perfectly transfer to other cultures
- Scores are rising in most countries (the Flynn effect) — estimates from 10+ years ago are already outdated
How do you compare?
Take a 20-minute IQ test and see your personal score — regardless of where you're from.
Countries with similar average IQ
- Average IQ in Brazil — estimated 87
- Average IQ in Colombia — estimated 89
- Average IQ in India — estimated 82
- Average IQ in Indonesia — estimated 87
- Average IQ in Philippines — estimated 81
What drives differences in national IQ?
Cross-national cognitive differences are strongly predicted by:
- Per-capita spending on education, particularly in early childhood
- Childhood nutrition — iodine, iron, and protein deficiency in early years have measurable cognitive effects
- Infectious disease burden — diseases that divert metabolic resources away from brain development
- Genetic diversity — surprisingly, more genetically diverse populations tend to score higher, not lower
- GDP per capita — as a proxy for all of the above
These factors suggest that national IQ averages are highly malleable — nutrition and education interventions reliably raise them over 1-2 generations.