North Dakota is about 1,009 times bigger than District of Columbia.

District of Columbia is approximately 177 sq km, while North Dakota is approximately 178,647 sq km, making North Dakota 100,831% larger than District of Columbia. Meanwhile, the population of District of Columbia is ~601,723 people (70,868 more people live in North Dakota).
Tip: This to-scale comparison of District of Columbia vs. North Dakota uses the Mercator projection, which distorts the size of regions near the poles.