State size comparison

compared to

Washington is around the same size as South Dakota.

South Dakota is approximately 196,540 sq km, while Washington is approximately 172,348 sq km, making Washington 87.69% the size of South Dakota. Meanwhile, the population of South Dakota is ~814,180 people (5.9 million more people live in Washington).
Tip: This to-scale comparison of South Dakota vs. Washington uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Washington vs. South Dakota

Flip Comparison · See true size
See Washington on top of South Dakota
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Quality of Life Comparison · 16 statistics
Be 54.7% less likely to be unemployed in South Dakota
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Cost of Living Comparison · 7 categories - 2026 data
South Dakota is 20.9% cheaper than Washington
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