Qaleh Sorkh () is a village in, and the capital of, Ashayer Rural District of the Central District of Fereydunshahr County, Isfahan province, Iran.
At the time of the 2006 National Census, the village's population was 1,241 in 263 households. The following census in 2011 counted 1,204 people in 302 households. The 2016 census measured the population of the village as 962 people in 261 households. It was the most populous village in its rural district.