Wadsworth is a village in Lake County, Illinois, United States. The population was 3,815 at the 2010 census. It is named after E. S. Wadsworth, who was a major stockholder for the Chicago, Milwaukee, St. Paul and Pacific Railroad, which passes through the village.
Wadsworth is located at 42°26′10″N 87°55′16″W.
According to the 2010 census, Wadsworth has a total area of 9.671 square miles (25.05 km2), of which 9.58 square miles (24.81 km2) (or 99.06%) is land and 0.091 square miles (0.24 km2) (or 0.94%) is water.
As of the census of 2000, there were 3,083 people, 1,036 households, and 886 families residing in the village. The population density was 351.4 people per square mile (135.7/km2). There were 1,051 housing units at an average density of 119.8 per square mile (46.3/km2). The racial makeup of the village was 94.13% White, 1.72% African American, 0.13% Native American, 1.04% Asian, 1.04% from other races, and 1.95% from two or more races. Hispanic or Latino of any race were 3.54% of the population.
There were 1,036 households out of which 39.3% had children under the age of 18 living with them, 78.9% were married couples living together, 4.0% had a female householder with no husband present, and 14.4% were non-families. 11.5% of all households were made up of individuals and 4.8% had someone living alone who was 65 years of age or older.