Bung Khla (, ; , ) is a district (amphoe) of Bueng Kan province, northeastern Thailand.
The minor district (king amphoe) was split off from Bueng Kan district on 1 April 1991. It was upgraded to a full district on 5 December 1996.
Neighboring districts are (from the south clockwise) Bueng Khong Long, Seka, and Mueang Bueng Kan of Bueng Kan Province. To the east across the Mekong river is the Laotian province Bolikhamxai.
The Phu Wua Wildlife Sanctuary is in the district.
The district is divided into three sub-districts (tambons), which are further subdivided into 25 villages (mubans). There are no municipal (thesaban) areas, and three tambon administrative organizations (TAO).
The district's location on a bank of the Mekong has made it a prime agricultural area. Tomatoes, in particular, are one of the more profitable crops.