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.
Dwight is located at 41°5′35″N 88°25′38″W / 41.09306°N 88.42722°W / 41.09306; -88.42722 (41.092975, -88.427273).
According to the 2010 census, Dwight has a total area of 3.23 square miles (8.37 km), of which 3.22 square miles (8.34 km) (or 99.69%) is land and 0.01 square miles (0.03 km) (or 0.31%) is water.
Dwight is mostly located in Livingston County, but a small portion extends northward into Grundy County to include the commercial area near the northern I-55 interstate exit.
As of the census of 2000, there were 4,363 people, 1,667 households, and 1,096 families residing in the village. The population density was 1,694.8 people per square mile (655.5/km²). There were 1,803 housing units at an average density of 700.4 per square mile (270.9/km²). The racial makeup of the village was 96.72% White, 0.92% African American, 0.05% Native American, 0.25% Asian, 1.17% from other races, and 0.89% from two or more races. Hispanic or Latino of any race were 2.80% of the population.
There were 1,667 households out of which 33.9% had children under the age of 18 living with them, 52.8% were married couples living together, 10.2% had a female householder with no husband present, and 34.2% were non-families. 29.6% of all households were made up of individuals and 14.2% had someone living alone who was 65 years of age or older. The average household size was 2.48 and the average family size was 3.10.
In the village, the age distribution of the population shows 26.4% under the age of 18, 8.1% from 18 to 24, 29.5% from 25 to 44, 20.9% from 45 to 64, and 15.1% who were 65 years of age or older. The median age was 37 years. For every 100 females, there were 88.0 males. For every 100 females age 18 and over, there were 86.3 males.
The median income for a household in the village was $40,071, and the median income for a family was $44,813. Males had a median income of $37,429 versus $27,813 for females. The per capita income for the village was $20,928. About 5.0% of families and 10.8% of the population were below the poverty line, including 9.8% of those under age 18 and 10.2% of those age 65 or over.