 On 26 July 1984, the minor district was elevated to a district, and on 25 May 1999 Sanitary District Sai Mun was elevated to township ("thesaban tambon") status.Neighboring districts are (from the northeast clockwise) Kut Chum and Mueang Yasothon of Yasothon Province, and Selaphum of Roi Et Province.The district is divided into five sub-districts ("tambons") with 53 villages ("mubans").