Guam is about 266 times smaller than Iowa.

Iowa is approximately 144,701 sq km, while Guam is approximately 544 sq km, making Guam 0.38% the size of Iowa. Meanwhile, the population of Iowa is ~3.0 million people (2.9 million fewer people live in Guam).
This to-scale comparison of Iowa vs. Guam uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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