Montana is about 1.5 times bigger than Oregon.

Oregon is approximately 248,631 sq km, while Montana is approximately 376,979 sq km, making Montana 52% larger than Oregon. Meanwhile, the population of Oregon is ~3.8 million people (2.8 million fewer people live in Montana).
This to-scale comparison of Oregon vs. Montana uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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