Colfax is a village in McLean County, Illinois, United States. The population was 1,061 at the 2010 census. It is part of the Bloomington–Normal Metropolitan Statistical Area.
Colfax is located at 40°33′59″N 88°36′55″W / 40.56639°N 88.61528°W / 40.56639; -88.61528 (40.566290, -88.615304).
According to the 2010 census, Colfax has a total area of 0.55 square miles (1.42 km), all land.
As of the census of 2000, there were 989 people, 395 households, and 253 families residing in the village. The population density was 1,829.4 people per square mile (707.1/km²). There were 422 housing units at an average density of 780.6 per square mile (301.7/km²). The racial makeup of the village was 99.09% White, 0.51% Native American, 0.20% from other races, and 0.20% from two or more races. Hispanic or Latino of any race were 1.42% of the population.
There were 395 households out of which 28.4% had children under the age of 18 living with them, 55.7% were married couples living together, 6.3% had a female householder with no husband present, and 35.7% were non-families. 32.2% of all households were made up of individuals and 16.5% had someone living alone who was 65 years of age or older. The average household size was 2.39 and the average family size was 3.06.
In the village, the population was spread out with 25.3% under the age of 18, 6.5% from 18 to 24, 27.0% from 25 to 44, 18.3% from 45 to 64, and 23.0% who were 65 years of age or older. The median age was 40 years. For every 100 females, there were 93.5 males. For every 100 females age 18 and over, there were 83.4 males.
The median income for a household in the village was $41,544, and the median income for a family was $50,500. Males had a median income of $31,875 versus $23,438 for females. The per capita income for the village was $17,993. About 0.8% of families and 3.1% of the population were below the poverty line, including 1.2% of those under age 18 and 5.6% of those age 65 or over.