 Non Khun was created as a minor district ("king amphoe") under Kanthararom District on 1 September 1977, with the "tambons", Non Kho, Pho, Bok, and Nong Kung.It was upgraded to a full district on 1 January 1988.The district is divided into five sub-districts ("tambons"), which are further subdivided into 80 villages ("mubans").