The minor district (King Amphoe) was established on June 2 1975, when the five tambon Nikhom Kham Soi, Na Kok, Na Udom, Nong Waeng and Kok Daeng were split off from Mukdahan district.1 It was upgraded to a full district on March 25 1979.2 When Mukdahan Province was created in 1982, Nikhom Kham Soi was one of districts forming the new new province.
Administration
The district is subdivided into 7 subdistricts (tambon), which are further subdivided into 79 villages (muban). Nikhom Kham Soi is a township (thesaban tambon) which covers parts of the tambon Nikhom Kham Soi, Na Kok and Chok Chai. There are further 7 Tambon administrative organization (TAO).