
Simpson precinct
- County:
- Johnson County
- County Seat:
- No
- Area (mi²):
- 36.374
- State:
- Illinois
Simpson precinct is located in Johnson County, Illinois. Simpson precinct has a 2025 population of 774. Simpson precinct is currently declining at a rate of 0% annually and its population has decreased by 0% since the most recent census, which recorded a population of 0 in 2020.
The average household income in Simpson precinct is $66,630 with a poverty rate of 21.06%. The median age in Simpson precinct is 40.6 years: 49.7 years for males, and 28.8 years for females.