Sudlaneh Rural District () is in the Central District of Quchan County, Razavi Khorasan province, Iran. Its capital is the village of Aliabad.
At the time of the 2006 National Census, the rural district's population was 18,985 in 4,512 households. There were 18,246 inhabitants in 5,043 households at the following census of 2011. The 2016 census measured the population of the rural district as 17,088 in 5,234 households. The most populous of its 48 villages was Farkhan-e Olya, with 2,062 people.