Union is located in Illinois. Union, Illinois has a population of 545. Union is more family-centric than the surrounding county with 36% households with children. The county percentage for households with children is 33%.
The median household income in Union, Illinois is $102,273. The median household income for the surrounding county is $87,114 compared to the national median of $66,222. The median age of people living in Union is 44.3 years.
The average high temperature in July is 84.5 degrees, with an average low temperature in January of 10.6 degrees. The annual precipitation is 36.48.