Washington is about 1.8 times smaller than Oman.

Oman is approximately 309,500 sq km, while Washington is approximately 172,348 sq km, making Washington 55.69% the size of Oman. Meanwhile, the population of Oman is ~3.8 million people (3.0 million more people live in Washington).
This to-scale comparison of Oman vs. Washington uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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