— US state cognitive research
Average IQ in Tennessee
Published state-level cognitive ability research places Tennessee at an estimated average IQ of around 97. These estimates carry wide confidence intervals and should be interpreted as rough population averages, not precise measurements.
Tennessee is in the bottom half of state IQ rankings, though Nashville's growing tech and healthcare sector is driving improvements.
Why state IQ averages differ
State-level IQ differences in the US are largely explained by:
- Educational spending per pupil — states that invest more in K-12 education see higher average cognitive test performance
- Income inequality — childhood poverty correlates strongly with cognitive test performance due to nutrition, stress, and access to stimulating environments
- Migration patterns — states with large educated immigrant inflows (California, New York, Virginia) score differently than net-outflow states
- Industry mix — tech-heavy states attract highly educated workers, raising the state average
- Urban concentration — virtually all states show urban areas outperforming rural areas by 8-12 IQ points
States with similar average IQ
- Average IQ in Ohio — estimated 99
- Average IQ in Michigan — estimated 99
- Average IQ in Pennsylvania — estimated 99
- Average IQ in Indiana — estimated 99
- Average IQ in Missouri — estimated 98
IQ vs educational outcomes
State IQ estimates correlate strongly (r ≈ 0.7) with NAEP (National Assessment of Educational Progress) scores, which are independently measured. This gives the estimates some external validity. The correlation also illustrates that IQ is bidirectional with education — better schools produce higher test scores and better test preparation environments.