Junction is a village in Gallatin County, Illinois, United States. The population was 129 at the 2010 census.
Junction is located at the center of Gallatin County at 37°43′22″N 88°14′17″W / 37.72278°N 88.23806°W / 37.72278; -88.23806 (37.722726, -88.237973). The village lies along Illinois Route 13, a few miles west of the Ohio River, and north of the Shawnee National Forest. The Saline River, a tributary of the Ohio, passes just to the south.
According to the 2010 census, Junction has a total area of 0.883 square miles (2.29 km), of which 0.88 square miles (2.28 km) (or 99.66%) is land and 0.003 square miles (0.01 km) (or 0.34%) is water.
As of the census of 2000, there were 139 people, 66 households, and 43 families residing in the village. The population density was 156.7 people per square mile (60.3/km²). There were 75 housing units at an average density of 84.5 per square mile (32.5/km²). The racial makeup of the village was 96.40% White, 2.88% Native American and 0.72% Asian. Hispanic or Latino of any race were 2.88% of the population.
There were 66 households out of which 25.8% had children under the age of 18 living with them, 45.5% were married couples living together, 18.2% had a female householder with no husband present, and 34.8% were non-families. 33.3% of all households were made up of individuals and 19.7% had someone living alone who was 65 years of age or older. The average household size was 2.11 and the average family size was 2.65.
In the village, the population was spread out with 18.7% under the age of 18, 9.4% from 18 to 24, 24.5% from 25 to 44, 29.5% from 45 to 64, and 18.0% who were 65 years of age or older. The median age was 44 years. For every 100 females, there were 80.5 males. For every 100 females age 18 and over, there were 73.8 males.
The median income for a household in the village was $33,750, and the median income for a family was $34,219. Males had a median income of $34,167 versus $27,083 for females. The per capita income for the village was $16,256. There were 3.8% of families and 11.1% of the population living below the poverty line, including no under eighteens and 41.4% of those over 64.