At the time of the 2006 National Census, the city's population was 8,529 in 2,269 households,[5] when it was capital of the former Shirgah District of Savadkuh County.

Its mountains called Terez in the west, Veresk in the east and Sarah sar and Shah kooh in the south.

From these bridges, pool Dokhtar (in Chali), a historical bridge of Shah Abbas, as its name implies, was made in the Safavid era (inside the city), and Abdangesar (it is on road to Ghaemshahr) and Poole Shahpoor, are the most famous of all.

People resided in present town and its skirts that led to establishment of primitive center of Shirgah.

During World War 2 some Russian troops have resided in a small part near Kalig Kheil (a village of Shirgah) that later came to call Russ Abad to equip rebuild and support themselves.

The first one tells that there were many thorny bushes in its forests when wood-cutters and farmers went among the forests, their skin was cut and bleeding so it called Kharkhoon is made up of two smaller words; The second comes from a story telling long before there was a ruler who had a strong lion.

Shirgah has got many beautiful and attractive weather and landscapes mentioned below: Waterfall near road to Zirab city said there ( tonel).

Jungle of Lafoor (name of village areas), rice fields, citrus gardens, nice villas, Keselian river, historical places and bridges, mild and cool weather in summer, natural pools suitable for swimming and so on.

If the healthcare and welfare facilities develop, Shirgah will certainly turn into one of the most beautiful enjoyable and attractive city in Iran.