District of Columbia is around the same size as Catalina Island.

Catalina Island is approximately 194 km² (75 sq mi), while District of Columbia is approximately 177 sq km, making District of Columbia 91.15% the size of Catalina Island.
Tip: This to-scale comparison of Catalina Island vs. District of Columbia uses the Mercator projection, which distorts the size of regions near the poles.
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