Grand Valley High School is a public high school in Orwell, Ohio. It is the only high school in the Grand Valley Local Schools district. Its mascot is the Mustang and the colors are blue and white. It serves the students of Hartsgrove, Orwell, Rome, Colebrook, and Windsor townships in Ashtabula County, Ohio. Some students may also have North Bloomfield, Lenox, Rock Creek, or New Lyme zip codes or telephone exchanges. It has an award-winning choral program and one of the best run drama departments in the area.