Sakon Nakhon is one of the north-eastern provinces of Thailand. Neighboring provinces are (from north clockwise) Nong Khai, Nakhon Phanom, Mukdahan, Kalasin and Udon Thani. The capital is Sakon Nakhon.
The word Sakon originates from the Sanskrit word sakala meaning entire, whole, or total, and the word Nakhon from Sanskrit nagara meaning town or city. Hence the name of the province literally means City of cities.
The province is located on the Khorat Plateau, not far from the river Mekong. The Nong Han lake - the biggest natural lake of North-East Thailand - near the city Sakon Nakhon is a popular resort of the local people. The Phu Phan Mountains delimit the province to the south.