Dahlgren is a village in Hamilton County, Illinois, United States. The population was 525 at the 2010 census. It is part of the Mount Vernon Micropolitan Statistical Area.
The Dahlgren railroad depot in 2019
The depot in 1956 looking SE from 3rd St.
Hamilton County, Illinois
Hamilton County is a county located in the U.S. state of Illinois. At the 2020 census, its population was 7,993. Its county seat is McLeansboro. It is located in the southern portion of the state known locally as "Little Egypt".
Hamilton County Courthouse in McLeansboro