Qaleh-ye Omidabad () is a village in Sarab-e Olya Rural District of Babaheydar District in Farsan County, Chaharmahal and Bakhtiari province, Iran.
The village is populated by Lurs.
At the time of the 2006 National Census, the village's population was 322 in 63 households, when it was in Mizdej-e Olya Rural District of the Central District. The following census in 2011 counted 275 people in 67 households, by which time the village had been separated from the district in the formation of Babaheydar District. Qaleh-ye Omidabad was transferred to Sarab-e Olya Rural District created in the new district. The 2016 census measured the population of the village as 198 people in 47 households.