Kalasin is a rich and fertile province of northeast Thailand.
From archeological evidence, it used to be the residence of Lawa tribal people having prosperous civilization which can be dated back to 1,600 years.
But from historical evidence, it was founded as a town in the beginning of Bangkok era around the year 1793 by Thao Somphamit who migrated with his people from the territory on the left bank of the Maekong River and settled down at Ban Keang Samrong near the bank of Nam Pao River.
After setting down he arranged to deliver offerings to be offered to King Rama I, Phra Phuttha Yodfa Chulalok Maharat asking him to accept his town to be a subject of Bangkok.
Later, by the royal command of King Rama l, Phra Phuttha Yodfa Chulalok Maharat, Ban Kaeng Samrong was upgraded to be a town having the name as Muang Kalasin due to its location being near the Nam Dam River which laterally means black water and at the same time Thao Somphamit was appointed Phraya Chaiyasunthon as the first ruler of Muang Kalasin.