Aslan Duz-e Gharbi Rural District (Persian: دهستان اصلاندوز غربی) is in the Central District of Aslan Duz County, Ardabil province, Iran. Its capital is the village of Gedaylu.

At the census of 2006, its population (as Aslan Duz Rural District of the former Aslan Duz District of Parsabad County) was 15,324 in 2,807 households. There were 16,116 inhabitants in 3,848 households at the following census of 2011. In the most recent census of 2016, the population of the rural district was 17,709 in 4,713 households. The most populous of its 54 villages was Aq Qabaq-e Sofla, with 872 people.

In 2017, the district was separated from the county in the establishment of Aslan Duz County, which was divided into two districts of two rural districts each, with Aslan Duz as its capital and only city. Aslan Duz Rural District's name was changed to Aslan Duz-e Gharbi Rural District.