Dwight is a village located mainly in Livingston County, Illinois, with a small portion in Grundy County. The population was 4,260 at the 2010 census. Dwight contains an original stretch of the famous U.S. Route 66, and from 1892 until 2016 continuously used a railroad station designed in 1891 by Henry Ives Cobb. Interstate 55 bypasses the village to the north and west.