Mashhad ol Kubeh Rural District () is in Saruq District of Arak County, Markazi province, Iran. Its capital is the village of Mashhad ol Kubeh.
After the 2006 National Census, Saruq Rural District was separated from the Central District in the formation of Saruq District, and Mashhad ol Kubeh Rural District was created in the district.
At the time of the 2011 census, the rural district's population was 3,264 in 977 households. The 2016 census measured the population of the rural district as 2,980 in 933 households. The most populous of its 17 villages was Mashhad ol Kubeh, with 1,386 people.