The minor district (king amphoe) Ubolratana was established on 20 August 1974 by splitting the three tambons, Khok Sung, Na Kham, and Ban Dong from Nam Phong district.
The minor district (king amphoe) Ubolratana was created on 20 August 1974 by dividing the three tambons, Khok Sung, Na Kham, and Ban Dong from Nam Phong district.