Indiana is about 1.9 times smaller than Oklahoma.

Oklahoma is approximately 177,847 sq km, while Indiana is approximately 92,895 sq km, making Indiana 52.23% the size of Oklahoma. Meanwhile, the population of Oklahoma is ~3.8 million people (2.7 million more people live in Indiana).
This to-scale comparison of Oklahoma vs. Indiana uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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