Mediterranean Sea vs. Great Lakes: A 10-to-1 Size Difference

The Mediterranean Sea dwarfs North America's Great Lakes—covering 2.5 million km² versus the Great Lakes' combined 246,000 km². That's roughly a 10:1 ratio in surface area.

By the Numbers

• Mediterranean Sea: 2,500,000 km² surface area, 3,750,000 km³ volume, 1,500 m average depth
• Great Lakes (combined): 246,000 km² surface area, 22,700 km³ volume, 147 m average depth

Why the Massive Difference?

The Mediterranean is a true sea—connected to the Atlantic, spanning 4,000 km east-west, with tectonic origins creating deep basins. The Great Lakes are glacial scour depressions filled with freshwater, relatively shallow and entirely landlocked.

Different Roles, Both Vital

The Mediterranean drives regional climate, hosts 17,000+ marine species, and has been a civilizational crossroads for millennia. The Great Lakes hold 21% of Earth's surface freshwater, support 34 million people, and power a massive industrial economy.

While the Mediterranean is ~10× larger in area, the Great Lakes contain 84% of North America's surface freshwater—a resource of incalculable value.