District of Columbia is about 149 times smaller than Rwanda.

Rwanda is approximately 26,338 sq km, while District of Columbia is approximately 177 sq km, making District of Columbia 0.67% the size of Rwanda. Meanwhile, the population of Rwanda is ~13.2 million people (12.6 million fewer people live in District of Columbia).
Tip: This to-scale comparison of Rwanda vs. District of Columbia uses the Mercator projection, which distorts the size of regions near the poles.
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