Sisaket is a town municipality in northeast Thailand, incorporating Mueang Nuea and Mueang Tai Subdistricts and parts of Cham, Nong Khrok, Pho, Phon kha, and Ya Plong Subdistricts, all in Mueang Sisaket district, the capital of Sisaket province. As of 2017, it has a population of 40,117.