The province of semnan covers an erea of 96816 square kilomiters from east it goes to khorasan from north to mazandaran and golestan provinces. To the west Tehran and qum provinces.

The township of the province are include: semnan , damghan , shahrood and garmsar, the center of this province , semnan , whit 100000 population is located 220 km from the center of the contry and the distance with international waters of Persian gulf and Caspian sea in turn is 1600 and 200 and kilomiters. This province include 4 townships , 12 districts , 16 cities and 28 villages.