California is about 1.5 times bigger than Colorado.

Colorado is approximately 268,627 sq km, while California is approximately 403,882 sq km, making California 50% larger than Colorado. Meanwhile, the population of Colorado is ~5.0 million people (32.2 million more people live in California).
This to-scale comparison of Colorado vs. California uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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