Dwight is a village located mainly in Livingston County, Illinois, with a small portion in Grundy County. The population was 4,032 at the 2020 census. Dwight contains an original stretch of 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.

Livingston County is a county located in the U.S. state of Illinois. According to the 2020 census, it has a population of 35,815. Its county seat is Pontiac. Livingston County comprises the Pontiac, IL Micropolitan Statistical Area, which is combined with the Bloomington–Normal metropolitan statistical area as the Bloomington-Pontiac, IL Combined Statistical Area in upper portion of Central Illinois.