The Province is located in the northeastern corner of Thailand. It borders from the south clockwise Nakhon Phanom, Sakon Nakhon, Udon Thani and Nong Khai Province. To the north and east it borders Laos, with the Mekong river forming the natural boundary. In Bung Khla district is the Phu Wua Wildlife Sanctuary, protecting a forest- covered hill area close to the Mekong river.