Lyons Township High School (often referred to as LTHS or simply LT) is a public high school located in Western Springs, Illinois (South Campus), and also in La Grange, Illinois (North Campus). Lyons Township is a co-educational high school and serves grades 9–12 for Lyons Township High School District 204. Lyons Township High School is the 8th-largest public high school in Illinois and the 46th-largest public high school in the United States.