Boyolali is a regency (Indonesian: kabupaten) in the eastern part of Central Java province in Indonesia. Its capital is Boyolali.
The capital city, also named Boyolali, lies 27 km to the west of Solo. The regency covers an area with approximately 1,015.10 km² Highest point: Mount Merbabu - 3,141 m
Beside Mount Merbabu, the famous Mount Merapi is also located in this regency.
Boyolali regency surrounded by other regencies: Klaten and Yogyakarta province in the south; Sukoharjo, Karanganyar and Sragen regencies and Solo city in the east; Salatiga city and Grobogan Regency in the north; and Magelang Regency in the west.