Other township municipalities include Indian Head Park, Hodgkins and McCook, as well as major portions of Western Springs, Brookfield, Bridgeview, Burr Ridge and Willow Springs.

Lyons Township's approximate borders are Harlem Avenue (Illinois Route 43) on the east, the line of 39th Street (Pershing Road) on the north, the DuPage County boundary (County Line Road) on the west, and the line of 87th Street on the south, except west of Willow Springs, where it follows the Des Plaines River to the DuPage county line.

The Chicago Sanitary and Ship Canal, designated a National Historic District in 2011, passes through the township from southwest to northeast.

There are seventeen municipalities completely or partially within Lyons Township's thirty-seven square miles of territory: The township contains these seven cemeteries: Archer Woods Memorial Park, Bethania, LaGrange, Lithuanian National, Resurrection, Saint Johns and Lyonsville.

As of the 2020 census[1] there were 115,105 people, 40,149 households, and 28,034 families residing in the township.

27.00% of all households were made up of individuals, and 11.40% had someone living alone who was 65 years of age or older.