Buin Miandasht District () is a former administrative division of Faridan County, Isfahan province, Iran. Its capital was the city of Buin Miandasht.
After the 2011 National Census, the district was separated from the county in the establishment of Buin Miandasht County.
At the time of the 2006 census, the district's population was 27,586 in 6,666 households. The following census in 2011 counted 26,137 people in 7,532 households.