With an area of 95815 square kilometers, the Province of Semnan is located to the east of the province of Tehran. It includes 4 districts which are: Semnan, Shahrood, Damghan and Garmsar.

In 1991 the population of the province was about 1457000, which is formed of 61.6% registered to be urban dwellers, and the remaining 38.4% as villagers.