Mentor High School is a public high school located in Mentor, Ohio, United States. It is the only high school in the Mentor Exempted Village School District. At one time, it was the largest high school in Ohio based on single building enrollment. For the 2008–2009 school year, it shifted from a three-year school to a four-year high school, serving approximately 2,700 students. Mentor High School educates students from Mentor, Mentor-on-the-Lake, and parts of Kirtland Hills and Concord Township in Lake County, Ohio. Both middle schools from the Mentor Exempted Village School district, Memorial Middle School, Shore Middle School, feed into Mentor High School. The third middle school, Ridge Middle School, closed before the 2018–2019 school year had commenced, and has since been repurposed as an elementary school.