Bürd (Mongolian: Бүрд) is a sum (district) of Övörkhangai Province in southern Mongolia. In 2008, its population was 3,135.

Bürd sum was where what would become the modern Mongolian capital of Ulaanbaatar was founded. It was established near Shireet Tsagaan Nuur, a lake in the north of the sum in 1639, to be the seat of Zanabazar.