The minor district (King Amphoe) was created on July 18 1977, when the four tambon Po, Dot, Siao and Nong Ma were split off from Uthumphon Phisai district.1 1979 all subdistricts except Po were returned back to Uthumphon Phisai.2 The minor district was upgraded to a full district on July 4 1994.3
The district is subdivided into 2 subdistricts (tambon), which are further subdivided into 25 villages (muban). Bueng Bun is a township (thesaban tambon) which covers parts of both tambon. There is further 1 Tambon administrative organization (TAO).