Colchester is located in Illinois. Colchester, Illinois has a population of 1,372. Colchester is less family-centric than the surrounding county with 23% households with children. The county percentage for households with children is 24%.
The median household income in Colchester, Illinois is $44,580. The median household income for the surrounding county is $46,775 compared to the national median of $66,222. The median age of people living in Colchester is 41.9 years.
The average high temperature in July is 87 degrees, with an average low temperature in January of 13.3 degrees. The annual precipitation is 36.23.