Lyons Township High School (LTHS) is a public four-year high school serving students in grades 9-12 from the townships of Lyons, McCook, and portions of Brookfield, Countryside, Hodgkins, Indian Head Park, La Grange, La Grange Park, Western Springs, and Willow Springs in the western suburbs of Chicago, Illinois. Established in 1888, it is one of the oldest continuously operating high schools in the region and has grown from a single building to two campuses: the North Campus in Western Springs for freshmen and sophomores, and the South Campus in La Grange for juniors and seniors. The school is governed by the Lyons Township High School District 204 and emphasizes a balanced education with strong academic programs, including Advanced Placement courses, career and technical education, fine arts, and athletics. LTHS has a reputation for academic achievement, with high graduation rates and recognition in national rankings for its college readiness and STEM programs. Extracurricular activities are robust, featuring over 30 sports teams in the West Suburban Conference, competitive music and drama programs, and numerous clubs fostering leadership and community service. The school's mascot is the Lion, and its facilities include modern auditoriums, athletic fields, and technology labs. Enrollment typically exceeds 3,500 students, reflecting its role as a central educational hub for the community. Historically, LTHS has navigated challenges such as funding issues common to public schools and expansions to accommodate growth, while maintaining a commitment to diversity and inclusion. It has produced notable alumni in various fields and continues to invest in initiatives for equity and student well-being.