State size comparison

compared to

Montana is about 1.8 times bigger than Idaho.

Idaho is approximately 214,314 sq km, while Montana is approximately 376,979 sq km, making Montana 76% larger than Idaho. Meanwhile, the population of Idaho is ~1.6 million people (578,167 fewer people live in Montana).
Tip: This to-scale comparison of Idaho vs. Montana uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Montana vs. Idaho
Flip Comparison · See true size
See Montana on top of Idaho
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Quality of Life Comparison · 13 statistics
Be 14.9% less likely to live below the poverty line in Idaho
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Cost of Living Comparison · 7 categories - 2026 data
Idaho is 8.5% cheaper than Montana
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