State size comparison
compared to
Illinois is about 11 times bigger than Connecticut.
Connecticut is approximately 12,548 sq km, while Illinois is approximately 143,961 sq km, making Illinois 1,047% larger than Connecticut. Meanwhile, the population of Connecticut is ~3.6 million people (9.3 million more people live in Illinois).
Tip:
This to-scale comparison of
Connecticut
vs.
Illinois
uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Illinois vs. Connecticut
Flip Comparison · See true size
See Illinois on top of Connecticut
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Quality of Life Comparison · 14 statistics
Be 16.7% less likely to live below the poverty line in Connecticut
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Cost of Living Comparison · 7 categories - 2026 data
Connecticut is 14.3% more expensive than Illinois
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Moving from Illinois to Connecticut · Cost, visas & climate
Compare cost of living, salary and climate.
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