Sin Rural District (Persian: دهستان سین) is in the Central District of Borkhar County, Isfahan province, Iran.

[3] At the time of the 2011 census, the rural district's population was 5,205 in 1,625 households.

[5] The 2016 census measured the population of the rural district as 38 in 16 households.

The most populous of its 28 villages was Mahmudabad, with 16 people.

This Borkhar County location article is a stub.