Khorat is at the western edge of the Khorat Plateau. Historically, it once marked the boundary between Lao and Siamese territory. It is the gateway to the Lao-speaking northeast (Isan). Its location is 14°58.5′N 102°6′E / 14.9750°N 102.100°E / 14.9750; 102.100Coordinates: 14°58.5′N 102°6′E / 14.9750°N 102.100°E / 14.9750; 102.100. As of 2010, the municipal area had a population of 142,645.