The geography of Iran is diverse but undeniable. It consists of high plateaus, rugged mountains, and expansive deserts and lies at the crossroads of West Asia geographically. Geographically the region has shaped settlement and agricultural patterns and provided strategic defenses through time.
Mostly located on the Iranian Plateau, which has an average elevation of 900 to 1200 meters above sea level, Iran is bordered by major mountain ranges all around it. The west of the country is home to the Zagros Mountains, which extends from northwest to southeast, with some peaks reaching elevations of 3000 to 4000 meters. The Alborz Mountain range is located north of the Caspian Sea with Mount Damavand at the extreme northwestern edge of the range at 5610 meters above sea level (the tallest mountain in Iran).
As a volcanic mountain and symbol of the Alborz, Mount Damavand has affected the local climate and appears in many myths surrounding the region.
Regions
Northern Caspian Lowlands: Fertile strip running along northern borders of Iran, subtropical climate, high levels of precipitation; major area for rice and tea crops.
Southwestern Khuzestan Plain: extends from Mesopotamia (modern Iraq); marshy area with large oil reserves; major agricultural area because of rivers like the Karun River.
Central Plateau: consists of several arid basins; salt flats include Dasht-e Kavir and Dasht-e Lut; has a very sparse population except for oasis communities.
Eastern Deserts: large sandy areas with an elevation lower than 1500 m.
Water Bodies and Borders
Iran shares borders with Armenia, Azerbaijan, Turkmenistan, Afghanistan, Pakistan, Turkey, and Iraq. Also, it has three coastline borders—the Caspian Sea to the north; The Persian Gulf and Gulf of Oman along the southern border, allowing them to control chokepoints such as the Strait of Hormuz that are critical to the flow of oil in and out of the country and around the world.
Provinces Overview
Iran’s administrative provinces cover an area of approximately 1.6 million square kilometers. The population density in Tehran Province is the highest; it has a population of more than 11,000 residents per square kilometer. Conversely, in the south-eastern part of the country, Sistan and Baluchestan are two of the largest and least populated provinces.
This map details all 31 provinces, highlighting their boundaries and coastal positions.
Physiographic Zones
The rugged Zagros (west) and Alborz (north) enclose the Central Plateau’s basins, covering 50% of land as arid/semi-arid. Dasht-e Lut reaches 70°C extremes, while Caspian areas stay milder. These zones drive 82% aridity, stressing water resources amid 80+ million population.
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Major Landforms of South West Asia