What share of Iran's population lives near the Caspian Sea, given the distribution on land?

• A. 67% live on 27% of land near the Caspian Sea
• B. 50% live on 50% of land
• C. 80% live on 20% of land
• D. 30% live on 70% of land

Answer: (A)

A large portion of Iran’s people live along the Caspian coastal plain because that region provides a much more favorable environment for settlement and farming than the rest of the country. The Caspian coast is a narrow strip with higher rainfall and fertile soils, supporting dense towns, agriculture (rice, tea, citrus), and transportation hubs. That combination draws people into a relatively small area, so a big share of the population concentrates there even though the land area is only a fraction of Iran’s total. That’s why about two-thirds of Iranians live on roughly a quarter of the land near the Caspian Sea. The remainder of the country is largely arid or mountainous, leading to much lower population density across a much larger area.