District of Columbia is about 9,312 times smaller than Iran.

Iran is approximately 1,648,195 sq km, while District of Columbia is approximately 177 sq km, making District of Columbia 0.01% the size of Iran. Meanwhile, the population of Iran is ~86.8 million people (86.2 million fewer people live in District of Columbia).
Tip: This to-scale comparison of Iran vs. District of Columbia uses the Mercator projection, which distorts the size of regions near the poles.
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