Pea Ridge township
- County:
- Brown County
- County Seat:
- No
- Area (mi²):
- 37.32
- State:
- Illinois
Pea Ridge township is located in Brown County, Illinois. Pea Ridge township has a 2025 population of 186. Pea Ridge township is currently declining at a rate of 0% annually and its population has increased by 2.2% since the most recent census, which recorded a population of 182 in 2020.
The median age in Pea Ridge township is 75.1 years: 0 years for males, and 0 years for females.