Wadsworth is a village in Lake County, Illinois, United States. The population was 3,083 at the 2000 census. It is named after Julius Wadsworth, who was on the board of directors 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 / 42.436052°N 87.921093°W / 42.436052; -87.921093.
According to the United States Census Bureau, the village has a total area of 8.8 square miles (22.8 km²), of which, 8.8 square miles (22.7 km²) of it is land and 0.04 square miles (0.1 km²) of it (0.45%) is water.