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 continuously used a railroad station designed in 1891 by Henry Ives Cobb from 1892 until 2016. It is about 80 miles (129 km) southwest of Chicago. I-55 bypasses the village to the north and west.