Dahlgren is located in Illinois. Dahlgren, Illinois has a population of 778. Dahlgren is more family-centric than the surrounding county with 36% households with children. The county percentage for households with children is 27%.
The median household income in Dahlgren, Illinois is $56,414. The median household income for the surrounding county is $54,938 compared to the national median of $66,222. The median age of people living in Dahlgren is 42.6 years.
The average high temperature in July is 89.2 degrees, with an average low temperature in January of 20.3 degrees. The annual precipitation is 43.9.