Griswold High School is the only public secondary school in Griswold, Connecticut, for grades 9 to 12. In addition to students promoted from Griswold Middle School, the school also enrolls students from the nearby towns of Canterbury, Franklin, Lisbon, Norwich, Preston, Sprague, and Voluntown. Griswold High School is part of Griswold Public Schools, supported by the Griswold Board of Education. Griswold supplies Chromebooks for every student. Facilities within Griswold High School are available for community use outside of school hours.