Khashaat (, "fenced") is a sum (district) of Arkhangai Province in central Mongolia. The economy is based on herding. Khashaat is primarily known for several monuments left by an ancient Turkic empire. Khashaat's terrain is steppe, with no woodland, unlike many other sums in Arkhangai. In 2009, its population was 3,344
The sum is located at the eastern most part of the province.
The district is divided into five bags, which are: