Average IQ in Illinois

    Average IQ

    100.1

    US Ranking

    #22

    of 50 states

    Region

    Midwest

    Note: State-level IQ estimates are derived from standardized test scores (NAEP, SAT, ACT) and demographic data. They reflect population-level trends influenced by education funding, socioeconomic factors, and demographics — not the intelligence of any individual resident.

    About Illinois's IQ Ranking

    Illinois sits right at the national average, reflecting the contrast between Chicago's world-class university system and knowledge economy and the state's rural downstate communities. The University of Chicago, Northwestern, and the University of Illinois are all top research institutions. Chicago's finance, technology, and professional services sectors attract educated workers, but the state also has significant poverty concentrations.

    For global context, see how the US compares in our United States IQ page and the full country rankings.

    Illinois vs Other Midwest States

    StateAverage IQUS Rank
    Illinois100.1#22
    Minnesota103.7#5
    Iowa103.2#8
    Wisconsin102.9#10
    North Dakota102.7#10
    Nebraska101.4#15
    South Dakota101.4#15
    Kansas101.7#16
    Ohio99.8#24
    Michigan99.4#25
    Missouri99.5#26
    Indiana99.3#27

    Frequently Asked Questions

    What is the average IQ in Illinois?

    Illinois' estimated average IQ is 100.1, essentially the national average, ranking #22. Chicago's educated workforce is balanced by more modest educational outcomes in rural areas.

    How does Chicago affect Illinois' ranking?

    Chicago is a double-edged sword — its universities and professional class raise the average, but concentrated poverty in South and West Side neighborhoods pulls it down. Suburban Chicagoland generally scores well above average.

    How does Illinois compare to other Midwest states?

    Illinois (100.1) lags behind Minnesota (103.7) and Wisconsin (102.9) but leads Indiana and Ohio. The northern Midwest states generally outperform the lower Midwest.

    Explore Other States

    Massachusetts (104.3)New Hampshire (104.2)Vermont (103.8)Connecticut (103.1)Minnesota (103.7)Oregon (103.4)Maine (103.4)Washington (102.9)

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