, a town of northern Persia (long. 53° 24′ E., lat. 35° 33′ N., alt. 1,138 m/3,734 ft.), in mediaeval Islamic times coming within the province of Ḳūmis [q.v.] and lying on the great highway connecting Rayy with the administrative centre of Ḳūmis, sc. Dāmg̲h̲ān [q.v.], and K̲h̲urāsān. To its north is situated the Elburz Mountain chain and to its south, the Great Desert. 1. History.

Simnān comes within what was the heartland of the Parthians (whose capital almost certainly was at S̲h̲ahr-i Ḳūmis, southeast of Dāmg̲h̲ān on the Simnān road), but nothing is known o…