Kiar-e Gharbi Rural District (Persian: دهستان كيار غربي), formerly Shalamzar Rural District (دهستان شلمزار), is in the Central District of Kiar County, Chaharmahal and Bakhtiari province, Iran. Its capital is the village of Kharaji.

At the National Census of 2006, its population (as a part of the former Kiar District of Shahrekord County) was 15,352 in 3,898 households. There were 9,814 inhabitants in 2,979 households at the following census of 2011, by which time the district had been separated from the county in the establishment of Kiar County. At the most recent census of 2016, the population of the rural district was 9,011 in 2,893 households. The most populous of its 12 villages was Kharaji, with 2,880 people.