Kazerun County (Persian: شهرستان کازرون) is in Fars province, Iran.

[4] In 2018, Kuhmareh and Somghan Rural Districts, and the cities of Nowdan and Qaemiyeh, were separated from the county in the establishment of Kuhchenar County.

[5] At the time of the 2006 census, the county's population was 258,097, in 58,036 households.

[7] The 2016 census measured the population of the county as 266,217 in 76,227 households.

[2] Kazerun County's population history and administrative structure over three consecutive censuses are shown in the following table.