Khatanbulag () is a sum (district) of Dornogovi Province in south-eastern Mongolia. It is the site of the restored Khamar Monastery that was built in 1820, destroyed in the Communist purges of 1937, and rebuilt after the Mongolian Revolution of 1990.
Khatanbulag is the largest district in Dornogovi Province. It is also the southern most district in the province.
The district is divided into six bags, which are: