Mashhad ol Kubeh () is a village in, and the capital of, Mashhad ol Kubeh Rural District of Saruq District, Arak County, Markazi province, Iran.
At the time of the 2006 National Census, the village's population was 1,658 in 435 households, when it was in Mashhad-e Miqan Rural District of the Central District. The following census in 2011 counted 1,581 people in 444 households, by which time the rural district had been separated from the district in the establishment of Saruq District. The village was transferred to Mashhad ol Kubeh Rural District created in the new district. The 2016 census measured the population of the village as 1,386 people in 425 households. It was the most populous village in its rural district.