Savojbolagh County (Persian: شهرستان ساوجبلاغ) is in Alborz province, Iran.

"[4] The 14th-century author Hamdallah Mustawfi described it as having "a fine climate"; most of its water was drawn from qanats, and it produced a lot of fruit and grain.

[5] He wrote that the district had previously been attached to Ray for fiscal purposes under the Seljuk Empire, but under Mongol rule it had been detached.

[10] At the time of the 2006 census, the county's population (as a part of Tehran province) was 215,086 in 57,497 households.

[2] Savojbolagh County's population history and administrative structure over two censuses are shown in the following table.