Sadat Mahalleh () is a village in Abali Rural District of Rudehen District in Damavand County, Tehran province, Iran.
At the time of the 2006 National Census, the village's population was 1,396 in 380 households. The following census in 2011 counted 1,410 people in 402 households. The 2016 census measured the population of the village as 1,397 people in 436 households. It was the most populous village in its rural district.