Triad High School

Official websiteTriad High School is a high school located in Troy, Illinois. Triad serves the communities of Troy, St. Jacob, and Marine, as well as small portions of Collinsville, Maryville, Glen Carbon, and Highland. The school district has a total area of 121.5 square miles (315 km2). The majority of Triad High School students live in Troy, Illinois, which is a suburb 18 miles (29 km) northeast of St. Louis, Missouri.