 The "tambon" Kok Pla Sio was added from Mueang Sakon Nakhon District in 1996.On 11 October 1997 it was upgraded to a full district.Neighboring districts are (from the north clockwise) Kut Bak, Mueang Sakon Nakhon and Tao Ngoi of Sakon Nakhon Province, Na Khu, Huai Phueng, Somdet and Kham Muang of Kalasin Province.