Hahnaman township
- County:
- Whiteside County
- County Seat:
- No
- Area (mi²):
- 35.794
- State:
- Illinois
Hahnaman township is located in Whiteside County, Illinois. Hahnaman township has a 2026 population of 349. Hahnaman township is currently growing at a rate of 0.87% annually but its population has decreased by -0.29% since the most recent census, which recorded a population of 350 in 2020.
The median household income in Hahnaman township is $116,875 with a poverty rate of 5.76%. The median age in Hahnaman township is 57.2 years: 56.6 years for males, and 57.5 years for females. For every 100 females there are 113.8 males.