Khanmirza County () is in Chaharmahal and Bakhtiari province, Iran. Its capital is the city of Aluni, whose population at the time of the 2016 National Census was 2,775 in 734 households.
In 2019, Armand Rural District and Khanmirza District were separated from Lordegan County to establish Khanmirza County. The new county was divided into two districts of two rural districts each, with Aluni as its capital and only city at the time.
Khanmirza County's administrative structure is shown in the following table.