Cooperstown township
- County:
- Brown County
- County Seat:
- No
- Area (mi²):
- 40.674
- State:
- Illinois
Cooperstown township is located in Brown County, Illinois. Cooperstown township has a 2026 population of 274. Cooperstown township is currently declining at a rate of 0% annually and its population has increased by 1.11% since the most recent census, which recorded a population of 271 in 2020.
The median household income in Cooperstown township is $86,154 with a poverty rate of 15.22%. The median age in Cooperstown township is 62.4 years: 63.5 years for males, and 62.3 years for females. For every 100 females there are 91.7 males.