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.

Si Phao Thai Si Sa Ket Festival is held every March 15-17 at Somdet Phra Si Nakharin Park when the Lamduan flowers in the park are in full bloom. Shows include cultural performances by 4 tribes, which are Khmer, Suai, Lao, and Yo. There are shops selling handicrafts and a light-and-sound show about the city’s construction.

Pha Mo I Daeng Half and Quarter Marathon is held on the third Sunday of August between Phumisaron village and Pha Mo I Daeng in Amphoe Kantharalak. Runners like this uphill marathon because it goes through a misty area in the rainy season.