The Caspian Sea is about 1,025 meters deep at its deepest point , which is roughly 3,360 feet.

Quick depth facts

  • Maximum depth: about 1,025 meters (≈3,360 feet), in the southern basin.
  • Average depth: about 200–210 meters (≈650–690 feet).
  • The northern part is very shallow, mostly only 4–8 meters deep.

Different parts of the Caspian

  • Northern Caspian : Wide but very shallow shelf, generally 5–6 meters deep and less than 20 meters at its deepest.
  • Middle Caspian : Drops to around 190 meters average depth, with deeper depressions.
  • Southern Caspian : Contains the South Caspian Depression, where the seafloor reaches about 1,025 meters below the surface.

Why this depth matters

  • That deepest point makes the Caspian one of the world’s deepest inland water bodies, behind giants like Lake Baikal and Lake Tanganyika.
  • The strong contrast between the shallow north and very deep south shapes its temperature, salinity, and ecosystems , with quite different conditions in each basin.

Information gathered from public forums or data available on the internet and portrayed here.