California is about 2.8 times bigger than Iowa.

Iowa is approximately 144,701 sq km, while California is approximately 403,882 sq km, making California 179% larger than Iowa. Meanwhile, the population of Iowa is ~3.2 million people (36.1 million more people live in California).
Tip: This to-scale comparison of Iowa vs. California uses the Mercator projection, which distorts the size of regions near the poles.
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