Mokriyan-e Gharbi Rural District () is in the Central District of Mahabad County, West Azerbaijan province, Iran. Its capital is the village of Deryaz.
At the time of the 2006 National Census, the rural district's population was 25,643 in 4,882 households. There were 28,877 inhabitants in 6,772 households at the following census of 2011. The 2016 census measured the population of the rural district as 30,719 in 8,068 households. The most populous of its 38 villages was Khaneqah-e Khangeh (now a neighborhood in the city of Mahabad), with 4,736 people.