Lebanon is a city in St. Clair County, Illinois, United States. The population was 5,523 at the 2010 census. Like many other places in "Little Egypt" or Southern Illinois, Lebanon was named after the Eastern Mediterranean country of the same name. It is a part of the Metro-East region of the Greater St. Louis metropolitan area.
Lebanon is home to McKendree University, the oldest college in Illinois.
Four or more years; Private not for profit; $28,560 average out-state tuition; $28,560 average in-state tuition