Average IQ by US State [2025 Complete Ranking]
January 15, 2025 · 5 min read
Massachusetts leads the nation with an average IQ of 104.3, while Mississippi ranks last at 94.2. Research suggests these differences are driven by education quality, economic factors, and access to cognitive enrichment — not inherent differences between populations.
Top 5 States by IQ
1. Massachusetts — 104.3 | 2. New Hampshire — 104.2 | 3. Vermont — 103.8 | 4. Connecticut — 103.7 | 5. New Jersey — 103.7
Find Your Score
State averages are just averages. Individual scores vary enormously within each state. Take our test to see exactly where you stand.