Mahshahr County (Persian: شهرستان ماهشهر‎), also known as Bandar-e Mahshahr County, is a county in Khuzestan Province in Iran. The capital of the county is Bandar-e Mahshahr. At the 2006 census, the county's population was 247,804, in 53,347 families. The county is subdivided into two districts: the Central District and Bandar-e Emam Khomeyni District.