District of Columbia is about 1.5 times smaller than Cayman Islands.

Cayman Islands is approximately 264 sq km, while District of Columbia is approximately 177 sq km, making District of Columbia 67.05% the size of Cayman Islands. Meanwhile, the population of Cayman Islands is ~64,309 people (537,414 more people live in District of Columbia).
Tip: This to-scale comparison of Cayman Islands vs. District of Columbia uses the Mercator projection, which distorts the size of regions near the poles.
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