The minor district (King Amphoe) Pak Chom was created on September 1 1967, when the three tambon Pak Chom, Hat Khamphi and Chiang Klom were split off from Chiang Khan district.1 It was upgraded to a full district in 1971.2
The important water resource are the Mekong and Chom Rivers.
Administration
The district is subdivided into 6 communes (tambon), which are further subdivided into 53 villages (muban). There are two townships (thesaban tambon) - Pak Chom and Chiang Klom each cover parts of the same-named tambon. There are further 6 Tambon administrative organizations (TAO).