The minor district (King Amphoe) was created on January 7 1986, when the four tambon Nam Kliang, La-o, Tong Pit and Khoen were split off from Kanthararom district.1 It was upgraded to a full district on July 4 1994.2
Administration
The district is subdivided into 6 subdistricts (tambon), which are further subdivided into 74 villages (muban). There are no municipal (thesaban) areas, and 6 Tambon administrative organizations (TAO).