
Sumner township
- County:
- Lawrence County
- County Seat:
- No
- Area (mi²):
- 37.247
- State:
- Illinois
Sumner township is located in Lawrence County, Illinois. Sumner township has a 2025 population of 812. Sumner township is currently declining at a rate of -0.25% annually and its population has decreased by -2.29% since the most recent census, which recorded a population of 831 in 2020.
The average household income in Sumner township is $104,044 with a poverty rate of 7.98%. The median age in Sumner township is 30.7 years: 30.9 years for males, and 29 years for females.