Dixon is a city and county seat of Lee County, Illinois, United States. The population was 15,733 as of the 2010 census, down from 15,941 at the 2000 census. The city is named after its founder John Dixon, who operated a rope ferry service across Rock River, which runs through the city of Dixon.
Dixon was the boyhood home of former U.S. President Ronald Reagan. The city is also the site of the Lincoln Monument State Memorial, marking the spot where Abraham Lincoln joined the Illinois militia at Fort Dixon in 1832 during the Black Hawk War. The memorial is located on the west side of Dixon's main north-south street, Galena Avenue, (U.S. Highway 52 also Illinois Route 26), north of the Rock River.