Prospect Hill Academy is located on three campuses in
Somerville, Massachusetts and
Cambridge, Massachusetts: • The
Early Childhood Campus, serving grades PreK-2, is located at 15 Webster Avenue, Somerville, in
Union Square (Somerville). • The
Upper Elementary Campus, serving grades 3-5, is located at 17 Franklin Street, in East Somerville. • The
Middle School and High School Campus, serving grades 6-12, is located at 50-54 Essex Street, Cambridge, near
Central Square (Cambridge). Grades 7-8 (Middle School) is at 50 Essex and 9-12 (High School & Collegiate Institute) is at 54 Essex. ==Extracurricular activities==