Lyons Township High School (often referred to as LTHS or simply LT) is a public high school in Western Springs, Illinois (South Campus), and La Grange, Illinois (North Campus).

Students from the communities of La Grange, Western Springs, Burr Ridge, La Grange Park, Countryside, Indian Head Park, Hodgkins, and parts of Brookfield, Willow Springs, and McCook attend Lyons Township.

[5] In 1956, South Campus was opened about a mile south-west in nearby Western Springs to accommodate the community's growing population.

66% of students identified as non-Hispanic white, 26% were Hispanic or Latino, 3% were multiracial, 3% were black or African-American, and 3% were Asian-American.

LTHS is the license holder of WLTL-FM, a Class A non-commercial radio station which broadcasts from the North Campus on 88.1 FM.