Miandorud-e Kuchak Rural District () is in the Central District of Sari County, Mazandaran province, Iran. Its capital is the village of Semes Kandeh-ye Olya.
At the time of the 2006 National Census, the rural district's population was 33,905 in 8,876 households. There were 34,380 inhabitants in 10,303 households at the following census of 2011. The 2016 census measured the population of the rural district as 37,386 in 12,320 households. The most populous of its 42 villages was Zoghal Chal, with 3,964 people.