State size comparison

compared to

Illinois is about 662 times bigger than Seattle.

Seattle is approximately 217 sq km, while Illinois is approximately 143,961 sq km, making Illinois 66,150% larger than Seattle.
Tip: This to-scale comparison of Seattle vs. Illinois uses the Mercator projection, which distorts the size of regions near the poles.
Share
Compare further: Illinois vs. Seattle
Flip Comparison · See true size
See Illinois on top of Seattle
→
Cost of Living Comparison · 7 categories - 2026 data
Seattle is 35.4% more expensive than Illinois
→