Fox C-6 School District is a school district headquartered in Arnold, Missouri in Greater St. Louis. The district serves northeastern Jefferson County, including suburban areas to the north and rural areas to the south. The district serves Arnold and several unincorporated areas, including portions of Barnhart and Imperial. As of 2014, the district has almost 12,000 students, while about 65,000 people total live within the district boundaries. It is the largest school district in Jefferson County.