Byron is a city in Ogle County, Illinois, United States located on the Iowa, Chicago and Eastern Railroad, Illinois Route 72, and Illinois Route 2. The population was 2,917 at the 2000 census. The population was 3,582 (+22.8% change) in the July 2005 estimate census, and 3,865 (+30% change) in the city's own census in 2006. The Byron Nuclear Generating Station, currently owned by Exelon Corporation, is just south of Byron. The station provides a great deal of the electricity used in northern Illinois. The town is also the birthplace of Albert Spalding and Wilson Irvine.