Esfahak (Persian: اصفهك)[a] is a village in Deyhuk Rural District of Deyhuk District, Tabas County, South Khorasan province, Iran.

At the time of the 2006 National Census, the village's population was 726 in 192 households, when it was in Yazd province.

[5] The 2016 census measured the population of the village as 763 people in 248 households, by which time the county had been separated from the province to join South Khorasan province.

[6] It was the most populous village in its rural district.

This Tabas County location article is a stub.