Mark T. Sheehan High School is located in Wallingford, CT and is one of 3 high schools in Wallingford School District. It is a public school that serves 952 students in grades 9-12. See Mark T. Sheehan High School's test results
to learn more about school performance.
In 2011, Mark T. Sheehan High School had 14 students for every full-time equivalent teacher. The Connecticut average is 13 students per full-time equivalent teacher.