Hereford High School is a four-year public high school located in the rural northern Baltimore County town of Parkton, Maryland, United States, as part of the Baltimore County Public Schools. The school was established in 1954. The school's district is the Hereford Zone. The Hereford Zone covers 233 square miles and makes up over a third of Baltimore County by area. Like those of most public schools in the region, Hereford students are transported by a busing system.