Gorgan (Persian: گرگان, also Romanized as Gorgān and Gūrgān; Caspian: Vergen; formerly, Astarabad (Persian: اَستِر آباد, also Romanized as Asterābād), is the capital of Golestan Province, Iran. It lies approximately 400 km (250 mi) to the north east of Tehran, some 30 km (19 mi) away from the Caspian Sea. At the 2006 census, its population was 269,226, in 73,702 families.
Some 150 km (93 mi) east of Gorgan is the Golestan National Park. The city has a regional airport and several universities. Gorgan Airport was opened in September 2005.