Average IQ in Connecticut: Estimates & Context
Estimated Avg IQ
~103
US Ranking
#4
of 50 states
Region
Northeast
Note: No state administers IQ tests to its residents. These estimates are proxy conversions from standardized achievement scores (NAEP, SAT, ACT) — an approach popularized by McDaniel's 2006 state-IQ estimates in the journal Intelligence — combined with demographic data. Proxy conversions carry real limitations: SAT/ACT participation rates differ sharply by state and bias comparisons, and the variation within any state dwarfs the differences between states. Figures are shown rounded; decimal precision would overstate what these proxies can support. They say nothing about any individual resident.
About Connecticut's IQ Ranking
Connecticut ranks #4, reflecting its position as one of the wealthiest states with excellent suburban school districts and proximity to New York and Boston's knowledge economies. However, Connecticut also has one of the widest achievement gaps between wealthy and low-income districts in the country, with cities like Hartford and Bridgeport performing far below affluent suburbs like Greenwich and Westport.
What Shapes Connecticut's Cognitive Profile
Insurance actuaries in Hartford, hedge fund quantitative analysts in Stamford, and submarine engineers at Electric Boat in Groton give Connecticut an occupational mix unusually heavy in mathematical reasoning. Yale's research output and UConn's expansion in Storrs supply the pipeline, though many graduates decamp to New York within a few years. The Sheff v. O'Neill litigation, running since 1989, forced the creation of interdistrict magnet schools around Hartford and remains one of the longest school integration efforts in American legal history. Aerospace adds further cognitive demand: Pratt & Whitney's jet engine work in East Hartford employs thousands of engineers, and the supplier network reaches deep into smaller towns. Population growth has been nearly flat for two decades, so the educated workforce is sustained more by retention of high earners than by new arrivals. NAEP averages stay near the national top five, but eighth graders in Westport and Bridgeport are separated by several grade levels of equivalent learning, among the widest spreads any state records.
For global context, see how the US compares in our United States IQ page and the full country rankings.
Connecticut vs Other Northeast States
| State | Average IQ | US Rank |
|---|---|---|
| Connecticut | ~103 | #4 |
| Massachusetts | ~104 | #1 |
| New Hampshire | ~104 | #2 |
| Vermont | ~104 | #3 |
| Maine | ~103 | #6 |
| New Jersey | ~103 | #8 |
| Rhode Island | ~101 | #17 |
| New York | ~101 | #18 |
| Pennsylvania | ~101 | #20 |
| Delaware | ~100 | #24 |
Frequently Asked Questions
What is the average IQ in Connecticut?
Connecticut's estimated average IQ is 103.1, ranking #4. The state's wealthy suburbs drive high averages, though significant achievement gaps exist between affluent and low-income districts.
Why does Connecticut have a large achievement gap?
Connecticut's extreme wealth inequality creates two parallel education systems — excellent, well-funded suburban schools alongside underfunded urban districts. This gap is among the largest of any US state.
How does Connecticut compare to New York?
Connecticut (103.1) outranks New York (100.7) despite being smaller. Connecticut's suburban wealth and lack of large-scale urban poverty concentrations contribute to its higher average.
Explore Other States
Take our free IQ test to see how you compare, or learn what IQ actually measures.
MyIQScores Editorial Team
Editorial team focused on cognitive testing & psychometrics research
Last updated
May 10, 2026
MyIQScores content is written and maintained by our editorial team using published research in cognitive psychology and psychometrics as its source base. We label estimates as estimates, link primary sources where available, correct errors when readers flag them, and update pages as research or feedback warrants — see our corrections policy.