Mir Aqa Beyk () is a village in Pain Velayat Rural District of the Central District in Taybad County, Razavi Khorasan province, Iran.
At the time of the 2006 National Census, the village's population was 430 in 87 households. The following census in 2011 counted 269 people in 53 households. The 2016 census measured the population of the village as 108 people in 29 households.