Dahlgren township
- County:
- Hamilton County
- County Seat:
- No
- Area (mi²):
- 54.295
- State:
- Illinois
Dahlgren township is located in Hamilton County, Illinois. Dahlgren township has a 2026 population of 1,118. Dahlgren township is currently declining at a rate of -1.06% annually and its population has decreased by -2.53% since the most recent census, which recorded a population of 1,147 in 2020.
The median household income in Dahlgren township is $66,641 with a poverty rate of 9.42%. The median age in Dahlgren township is 35.8 years: 36 years for males, and 31.9 years for females. For every 100 females there are 86.6 males.