Sam Chai (Thai: สามชัย, pronounced [sǎːm t͡ɕʰāj]) is a district (amphoe) in the northern part of Kalasin province, northeastern Thailand.
Neighboring districts are (from the east clockwise): Kham Muang, Sahatsakhan, and Nong Kung Si of Kalasin Province and Wang Sam Mo of Udon Thani province.
The minor district (king amphoe) was created on 1 April 1995, when it was split off from Kham Muang district.[1]
On 15 May 2007, all 81 minor districts were upgraded to full districts.[2] With publication in the Royal Gazette on 24 August, the upgrade became official.[3]
The district is divided into four sub-districts (tambons), which are further subdivided into 46 villages (mubans). There are no municipal (thesaban) areas, and four tambon administrative organizations (TAO).