Semnan (pronounced [semˈnɒːn]; Persian:سمنان‎‎, also Romanized as Semnān and Samnān) is the capital city of Semnan Province, Iran. Its population was 153,680 people and 36,298 families as of the 2011 census. Semnan is located 216 kilometers east of Tehran in north central Iran. It is home to Semnani languages and is known as Seman locally.