State size comparison

compared to

Idaho is about 1.8 times smaller than Montana.

Montana is approximately 376,979 sq km, while Idaho is approximately 214,314 sq km, making Idaho 56.85% the size of Montana. Meanwhile, the population of Montana is ~989,415 people (578,167 more people live in Idaho).
Tip: This to-scale comparison of Montana vs. Idaho uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Idaho vs. Montana
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Quality of Life Comparison · 13 statistics
Be 17.5% more likely to live below the poverty line in Montana
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Cost of Living Comparison · 7 categories - 2026 data
Montana is 10.9% more expensive than Idaho
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