Lewis University is a private Catholic university located in Romeoville, Illinois. Enrollment is currently around 4,500 students. Lewis offers more than 60 majors and has several graduate programs.

Lewis University was founded in 1932 by the Chicago Archdiocese and Bishop Bernard J. Sheil as the Holy Name Technical School. The school gets its name from philanthropist Frank J. Lewis who funded the construction of many of the school's buildings. In 1934 it was renamed the Lewis Holy Name Technical School. The next year its name changed yet again to the Lewis Holy Name School of Aeronautics. In 1940, the name of the school changed to the Lewis School of Aeronautics. During World War II, normal classes were suspended as the campus was given to the United States Navy to train pilots. Regular classes resumed in late 1944 and the college soon adopted a more traditional arts and science curriculum. Women were admitted for the first time in 1949. Three years later the school's name was changed to the Lewis College of Science and Technology. The school's name was shortened to simply Lewis College in 1962 and finally received its current name of Lewis University in 1973.

Lewis University is a NCAA Division II school that is part of the Great Lakes Valley Conference.