State size comparison

compared to

Missouri is about 1.2 times bigger than Illinois.

Illinois is approximately 143,961 sq km, while Missouri is approximately 178,414 sq km, making Missouri 24% larger than Illinois. Meanwhile, the population of Illinois is ~12.8 million people (6.8 million fewer people live in Missouri).
Tip: This to-scale comparison of Illinois vs. Missouri uses the Mercator projection, which distorts the size of regions near the poles.
Share

Compare further: Missouri vs. Illinois

Flip Comparison · See true size
See Missouri on top of Illinois
→
Quality of Life Comparison · 16 statistics
Be 45.5% more likely to be unemployed in Illinois
→
Cost of Living Comparison · 7 categories - 2026 data
Illinois is 13.4% more expensive than Missouri
→
Moving from Missouri to Illinois · Cost, visas & climate
Compare cost of living, salary and climate.
→
Our free app, MapSize by MyLifeElsewhere — compare any two places, to scale on your mobile device.
Download on the App Store GET IT ON Google Play