
- Roman Empire: 5.0 million km2 (1.93 million sq miles); 3.71% of Earth’s land, but possibly as much as 30% of the world’s population.
- Contiguous United States (Lower 48 US States): 8.0 million km2 (3.1 million sq miles); around 5% of Earth’s land, but only 4.23% of the Earth’s population.
Also see the US over Europe:

If you like this comparison also see:








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