Winchester is a city in and the county seat of Scott County, Illinois, United States. The population was 1,650 at the 2000 census. Winchester is part of the Jacksonville Micropolitan Statistical Area.
Winchester is located at 39°37′48″N 90°27′21″W / 39.63000°N 90.45583°W / 39.63000; -90.45583 (39.630046, -90.455848).
According to the 2010 census, Winchester has a total area of 1.13 square miles (2.93 km), all land.
As of the census of 2000, there were 1,650 people, 727 households, and 460 families residing in the city. The population density was 1,551.3 people per square mile (601.0/km²). There were 778 housing units at an average density of 731.5 per square mile (283.4/km²). The racial makeup of the city was 99.88% White and 0.12% Native American. Hispanic or Latino of any race were 0.18% of the population.
There were 727 households out of which 31.2% had children under the age of 18 living with them, 49.4% were married couples living together, 11.4% had a female householder with no husband present, and 36.6% were non-families. 34.1% of all households were made up of individuals and 19.9% had someone living alone who was 65 years of age or older. The average household size was 2.27 and the average family size was 2.92.
In the city, the population was spread out with 25.0% under the age of 18, 6.4% from 18 to 24, 25.5% from 25 to 44, 21.8% from 45 to 64, and 21.3% who were 65 years of age or older. The median age was 40 years. For every 100 females, there were 85.4 males. For every 100 females age 18 and over, there were 80.8 males.
The median income for a household in the city was $30,938, and the median income for a family was $40,592. Males had a median income of $31,410 versus $20,000 for females. The per capita income for the city was $17,354. About 6.8% of families and 10.4% of the population were below the poverty line, including 12.0% of those under age 18 and 7.4% of those age 65 or over.