Roi Et is a town in north-eastern Thailand, capital of Roi Et province. It covers the whole tambon Nai Mueang of Mueang Roi Et district. As of 2006 it had a population of 34,229. Roi Et is 514 km from Bangkok, and is served by Roi Et Airport.
Roi Et is one of Thailand's seventy-six provinces (changwat) lies in central northeastern Thailand also called Isan. Neighboring provinces are Kalasin, Mukdahan, Yasothon, Sisaket, Surin, and Maha Sarakham.