LaSalle Township is located in LaSalle County, Illinois. As of the 2010 census, its population was 13,565 and it contained 6,356 housing units.[2] LaSalle Township was formed from Peru Township on an unknown date.
According to the 2010 census, the township has a total area of 17.53 square miles (45.4 km2), of which 16.87 square miles (43.7 km2) (or 96.24%) is land and 0.66 square miles (1.7 km2) (or 3.76%) is water.[2]