Kuh Mareh Sorkhi Rural District () is in Arzhan District of Shiraz County, Fars province, Iran. Its capital is the village of Richi.
At the time of the 2006 National Census, the rural district's population was 9,034 in 1,883 households. There were 7,488 inhabitants in 1,968 households at the following census of 2011. The 2016 census measured the population of the rural district as 7,009 in 1,986 households. The most populous of its 49 villages was Romeghan, with 764 people.