There are 2 real estate agents found in Dahlgren, IL. View our Dahlgren real estate area information to learn about the weather, local school districts, demographic data, and general information about Dahlgren, IL. Get in touch with a Dahlgren real estate agent who can help you find the home of your dreams in Dahlgren. Use our mortgage calculator to see how much it would be to finance a home in Dahlgren. Not ready to buy yet? Find and compare apartments for rent in Dahlgren.