The Gorgan Plain, or Dasht-e Gorgan (), is situated in northeastern Iran in Golestan Province. It extends from the lower slopes of the Alborz and Kopet Dag mountain ranges to the steppes of Turkmenistan. The River Gorgan flows through the plain from east to west, emptying into the Caspian Sea. The provincial capital Gorgan lies to the south of the plain, which covers an area of about and is situated between 37°00' and 37°30' north latitude, and between 54°00' and 54°30' east longitude. The annual precipitation in the south of the plain is about which is much higher than the just to the north. The southern part is very fertile, being watered by the many streams that flow from the Alborz Mountains.