Sisaket is a town municipality located in northeast Thailand. It serves as the capital of Sisaket province and encompasses the Mueang Nuea and Mueang Tai subdistricts, along with portions of the Cham, Nong Khrok, Pho, Phon kha, and Ya Plong subdistricts within the Mueang Sisaket district.
As of 2017, the municipality had a recorded population of 40,117 residents. The area functions as a primary administrative and residential hub for the surrounding provincial region.