District of Columbia is about 12,145 times smaller than Saudi Arabia.

Saudi Arabia is approximately 2,149,690 sq km, while District of Columbia is approximately 177 sq km, making District of Columbia 0.01% the size of Saudi Arabia. Meanwhile, the population of Saudi Arabia is ~35.4 million people (34.8 million fewer people live in District of Columbia).
Tip: This to-scale comparison of Saudi Arabia vs. District of Columbia uses the Mercator projection, which distorts the size of regions near the poles.
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