Boyolali is a regency located in the eastern part of the Central Java province in Indonesia. Its administrative center is the town of Boyolali.
The regency covers a total area of 1,096.61 km2. According to census data, the population was recorded at 930,531 in 2010 and reached 1,062,713 by 2020, with an official estimate of approximately 1,099,850 as of mid-2024.