Dorchester High School

Dorchester High School may refer to:


 * Dorchester High School (Massachusetts) (1852–2003) in the Dorchester neighborhood of Boston, Massachusetts, United States
 * Dorchester High School for Girls (1925–1953) in the Dorchester neighborhood of Boston, Massachusetts, United States
 * Dorchester High School (Nebraska) in Dorchester, Nebraska, United States
 * Lord Dorchester Secondary School in Dorchester, Ontario, Canada