Illinois vs Kansas: Population
Illinois has a larger population than Kansas by 9,874,628 people.
Visual Comparison
Difference: +9,874,628 people — Illinois leads.
Related Context
Population in Context
Raw headcount only tells part of the story — density and education round it out.
What This Means
Illinois vs Kansas: Population in context
Illinois has a population of 12,812,508, compared with 2,937,880 in Kansas — roughly 4.4× the Kansas figure. Total resident population (2020 Census).
People Also Ask
Illinois vs Kansas Population — Common Questions
Q What is Illinois's population?
Illinois's population is 12,812,508.
Q What is Kansas's population?
Kansas's population is 2,937,880.
Q Which state has a higher population — Illinois or Kansas?
Illinois has a larger population than Kansas by 9,874,628 people.
Q How much more population does Illinois have compared to Kansas?
+9,874,628 people.
More Comparisons: Illinois vs Kansas
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Sources: Core demographic data comes from the 2020 U.S. Census, with land area from U.S. Census Bureau TIGER files. Income, housing, affordability, and tax fields are maintained in our comparison dataset; purchasing-power figures use BEA Regional Price Parities. Minimum wage data comes from the U.S. Department of Labor, gas prices from AAA, and electricity rates from the U.S. Energy Information Administration. Political control and election fields use 2024 presidential results together with National Conference of State Legislatures data. Gun-law labels use the Giffords scorecard, alcohol system data comes from NABCA, and marijuana status uses NCSL's state cannabis laws tracker.