Qir and Karzin County () is located in Fars province, Iran. Its capital is the city of Qir.
After the 2006 National Census, the village of Shahrak-e Emam was elevated to the status of the city of Emam Shahr. The village of Mobarakabad rose to city status as well.
At the time of the 2006 census, the county's population was 61,432, in 13,246 households. The following census in 2011 counted 65,045 people, in 16,906 households. The 2016 census measured the population of the county as 71,203, in 20,508 households.
Qir and Karzin County's population history and administrative structure over three consecutive censuses are shown in the following table.