Michigan is about 1,415 times bigger than District of Columbia.

District of Columbia is approximately 177 sq km, while Michigan is approximately 250,493 sq km, making Michigan 141,421% larger than District of Columbia. Meanwhile, the population of District of Columbia is ~601,723 people (9.3 million more people live in Michigan).
Tip: This to-scale comparison of District of Columbia vs. Michigan uses the Mercator projection, which distorts the size of regions near the poles.