
Cooper township
- County:
- Sangamon County
- County Seat:
- No
- Area (mi²):
- 28.536
- State:
- Illinois
Cooper township is located in Sangamon County, Illinois. Cooper township has a 2025 population of 863. Cooper township is currently declining at a rate of -0.23% annually and its population has decreased by -1.93% since the most recent census, which recorded a population of 880 in 2020.
The average household income in Cooper township is $119,551 with a poverty rate of 0%. The median age in Cooper township is 46.8 years: 40.3 years for males, and 48.1 years for females.