
Sullivan township
- County:
- Moultrie County
- County Seat:
- No
- Area (mi²):
- 59.452
- State:
- Illinois
Sullivan township is located in Moultrie County, Illinois. Sullivan township has a 2025 population of 6,140. Sullivan township is currently declining at a rate of -0.37% annually and its population has decreased by -2.26% since the most recent census, which recorded a population of 6,282 in 2020.
The average household income in Sullivan township is $93,217 with a poverty rate of 8.26%. The median age in Sullivan township is 41.9 years: 38.7 years for males, and 43.8 years for females.