The minor district (King Amphoe) Yang Chum Noi was established on September 1 1971, when the three tambon Yang Chum Noi, Khon Kam and Lin Fa were split off from Mueang Sisaket district.1 On March 25 1979 it was upgraded to a full district.2
Administration
The district is subdivided into 7 subdistricts (tambon), which are further subdivided into 86 villages (muban). Yang Chum Noi is a township (thesaban tambon) which covers parts of tambon Yang Chum Noi. There are further 7 Tambon administrative organizations (TAO).