British Indian Ocean Territory is about 2,872 times smaller than Washington.

Washington is approximately 172,348 sq km, while British Indian Ocean Territory is approximately 60 sq km, making British Indian Ocean Territory 0.03% the size of Washington. Meanwhile, the population of Washington is ~8.0 million people (8.0 million fewer people live in British Indian Ocean Territory).
Tip: This to-scale comparison of Washington vs. British Indian Ocean Territory uses the Mercator projection, which distorts the size of regions near the poles.

Compare further: British Indian Ocean Territory vs. Washington

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