Mumej Kheyl () is a village in Valupey Rural District of the Central District in Savadkuh County, Mazandaran province, Iran.
At the time of the 2006 National Census, the village's population was 266 in 76 households. The following census in 2011 counted 254 people in 87 households. The 2016 census measured the population of the village as 276 people in 93 households.