Si Sa Ket is 571 kilometres from Bangkok. This is another province in the lower Northeast that received Khmer influence. Several interesting Khmer historical sites are in the province.

Si Sa Ket has an area of 8,840 square kilometres, comprising the following districts: Muang Si Sa Ket, Kanthararom, Kantharalak, Khun Han, Phrai Bung, Khukhan, Prang Ku, Uthumphon Phisai, Rasi Salai, Yang Chum Noi, Huai Thap Than, Non Khun, Si Rattana, Wang Hin, Bueng Bun, Nam Kliang, Phu Sing, Benchalak, Mueang Chan, Pho Si Suwan and Sila Lat.