Abhar or 'Abhar Chay' as is colloquially known is one of the most ancient regions of Iran. Existing evidences reveal that this area thrived and flourished in the 2nd millennium BC., the Medes were responsible for unifying various tribes then existing. It was during the Ilkhanan era that this region also saw progress in the way of communications due to the fact that Soltaniyeh was selected as the capital during the said reign.
Communication-wise this importance can be said to exist even today. The name of this city is derived from the Pahlavi language, a word pronounced as 'Oher'- meaning a place for 'blocking waters'. The original location of this city is known as 'Tappeh Qaleh' and stands on the right bank of the Abhar River. The said area is one of the ancient places of human settlement in Zanjan province, from the very beginning of the 4th millennium BC.
The famous Abhar river flows across this region which enjoys a mountainous climate with cold snowy winters and moderate summers.