Dahlgren, IL has a population of 402 and is the 20,860th largest city in the United States. The population density is 403 per sq mi which is 81% higher than the Illinois average and 345% higher than the national average. The median age in Dahlgren is 53 which is approximately 41% higher than the Illinois average of 37. In Dahlgren, 71% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 85% of Dahlgren residents were born in Illinois, 15% were born out of state, 0% were born outside of the United States and 0% were foreign born.
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The population density in Dahlgren is 81% higher than Illinois.
The median age in Dahlgren is 41% higher than Illinois.
In Dahlgren 100.00% of the population is White.
In Dahlgren 0.00% of the population is Black or African American.