Flag Center is located in Illinois. Flag Center, Illinois has a population of 4,646.
The median household income in Flag Center, Illinois is $47,088. The median household income for the surrounding county is $57,655 compared to the national median of $57,652. The median age of people living in Flag Center is 35.7 years.
The average high temperature in July is 83.9 degrees, with an average low temperature in January of 12.5 degrees. The average rainfall is approximately 37.1 inches per year, with 30.5 inches of snow per year.
