Mediterranean Sea vs. North Sea: Size Comparison

The Mediterranean Sea is significantly larger than the North Sea. With a surface area of approximately 2.5 million square kilometers (965,000 square miles), the Mediterranean ranks as the largest enclosed sea on Earth.

Key Comparisons

• Mediterranean Sea: 2.5 million km², average depth 1,500 m, max depth 5,267 m (Calypso Deep)
• North Sea: ~570,000 km², average depth 95 m, max depth 700 m (Norwegian Trench)

The Mediterranean's greater size reflects its tectonic origins as a remnant of the ancient Tethys Ocean, while the North Sea is a relatively shallow epicontinental sea on the European continental shelf. The Mediterranean connects to the Atlantic only through the narrow Strait of Gibraltar (14 km wide), contributing to its higher salinity and distinct circulation patterns.