Qaleh Sin (Persian: قلعه سين)[a] is a village in, and the capital of, Pishva Rural District of the Central District of Pishva County, Tehran province, Iran.

[4] At the time of the 2006 National Census, the village's population was 2,083 in 506 households, when it was in Asgariyeh Rural District of the former Pishva District of Varamin County.

[5] The following census in 2011 counted 2,122 people in 561 households,[6] by which time the district had been separated from the county in the establishment of Pishva County.

[4] The 2016 census measured the population of the village as 2,892 people in 811 households.

This Pishva County location article is a stub.