State size comparison

compared to

Colorado is about 1.2 times bigger than Idaho.

Idaho is approximately 214,314 sq km, while Colorado is approximately 268,627 sq km, making Colorado 25% larger than Idaho. Meanwhile, the population of Idaho is ~1.6 million people (3.5 million more people live in Colorado).
Tip: This to-scale comparison of Idaho vs. Colorado uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Colorado vs. Idaho

Flip Comparison · See true size
See Colorado on top of Idaho
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Quality of Life Comparison · 15 statistics
Make 34.3% less money in Idaho
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Cost of Living Comparison · 7 categories - 2026 data
Idaho is 11.5% cheaper than Colorado
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