Arak County (Persian: شهرستان اراک) is in Markazi province, Iran.

[8] At the time of the 2006 census, the county's population was 602,971 in 165,955 households.

[10] The 2016 census measured the population of the county as 591,756 in 188,180 households.

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

Media related to Arak County at Wikimedia Commons