Upper St. Clair High School was established in 1957, with the creation of a tenth grade class. Prior to 1957, Upper St. Clair students completing the ninth grade at Ft. Couch School were then enrolled as transfer students at neighboring high schools, primarily Mt. Lebanon, with Upper St. Clair Township paying their tuition as out-of-jurisdiction students. When Mt. Lebanon High School, due to crowded conditions, decided to no longer accept Upper St. Clair students, the Upper St. Clair School Board voted to create a high school. Dr. Carl Streams was recruited from Mt. Lebanon to become the new Supervising Principal, and he in turn recruited a high school faculty. One grade was added to Ft. Couch School each year from 1957 through September 1959, when the first high school senior class was enrolled. The inaugural class graduated in June 1960, and numbered 74 students, with most continuing on to college. The Class of 1960 created many of the traditions and artifacts for the high school, including the school colors, alma mater, mascot, yearbook, and school newspaper.