North Dakota is about 1.4 times smaller than Wyoming.

Wyoming is approximately 251,489 sq km, while North Dakota is approximately 178,647 sq km, making North Dakota 71.04% the size of Wyoming. Meanwhile, the population of Wyoming is ~563,626 people (108,965 more people live in North Dakota).
Tip: This to-scale comparison of Wyoming vs. North Dakota uses the Mercator projection, which distorts the size of regions near the poles.
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