Keystone High School may refer to: Keystone Charter School — Sandy Valley, Nevada Keystone High School (LaGrange, Ohio) Keystone Oaks High School — Pittsburgh, Pennsylvania Keystone Job Corp High School — Drums, Pennsylvania Keystone Junior/Senior High School — Knox, Pennsylvania Keystone Heights Junior-Senior High School — Keystone Heights, Florida Keystone National High School a correspondence school — Pennsylvania Keystone School — San Antonio, Texas