Sakon Nakhon is one of Thailand's seventy-six provinces (changwat) lies in upper northeastern Thailand also called Isan. Neighboring provinces are Nong Khai, Bueng Kan, Nakhon Phanom, Mukdahan, Kalasin, and Udon Thani. The capital is Sakon Nakhon.

The provinces of Thailand are administrative divisions of the government of Thailand. The country is divided into 76 provinces proper, with one additional special administrative area. They are the primary local government units and act as juristic persons. They are divided into amphoe (districts) which are further divided into tambon, the next lower level of local government.