
Delavan township
- County:
- Tazewell County
- County Seat:
- No
- Area (mi²):
- 30.158
- State:
- Illinois
Delavan township is located in Tazewell County, Illinois. Delavan township has a 2025 population of 1,894. Delavan township is currently declining at a rate of -0.32% annually and its population has decreased by -2.52% since the most recent census, which recorded a population of 1,943 in 2020.
The average household income in Delavan township is $74,979 with a poverty rate of 11.7%. The median age in Delavan township is 38.6 years: 36.7 years for males, and 41.8 years for females.