Heard Island and McDonald Islands is about 2.3 times bigger than District of Columbia.

District of Columbia is approximately 177 sq km, while Heard Island and McDonald Islands is approximately 412 sq km, making Heard Island and McDonald Islands 133% larger than District of Columbia.
Tip: This to-scale comparison of District of Columbia vs. Heard Island and McDonald Islands uses the Mercator projection, which distorts the size of regions near the poles.

Compare further: Heard Island and McDonald Islands vs. District of Columbia

Our free app, MapSize by MyLifeElsewhere — compare any two places, to scale on your mobile device.