The head of the khwaeng was Upahad (อุปฮาด), who reported to the governor of Ubon Ratchathani.

[1] Finally the district office was moved to Rong Kham Ma Chok in 1957.

On 14 September 1971 the Khong Chiam was renamed "Si Mueang Mai".

[2] Neighboring districts are (from the southeast clockwise) Khong Chiam, Phibun Mangsahan, Tan Sum, Trakan Phuet Phon, and Pho Sai.

The district is divided into 11 sub-districts (tambon), which are further subdivided into 118 villages (muban).