Montana is about 1.3 times bigger than Nevada.

Nevada is approximately 284,448 sq km, while Montana is approximately 376,979 sq km, making Montana 33% larger than Nevada. Meanwhile, the population of Nevada is ~2.7 million people (1.7 million fewer people live in Montana).
Tip: This to-scale comparison of Nevada vs. Montana uses the Mercator projection, which distorts the size of regions near the poles.
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