Sheridan High School is a public high school in Thornville, Ohio. The school is located in Northern Perry County. Sheridan High School's teams are known as the Generals, and the school colors are red and gray.
Three area schools (Glenford, Somerset, and Thornville) were combined in 1960 to form the Northern Local School District. Sheridan High School became the only high school in the new district. When the high school opened in 1960, there were 378 students enrolled in the school.