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 2026 population of 186. Pea Ridge township is currently growing at a rate of 0.54% annually and its population has increased by 1.64% since the most recent census, which recorded a population of 183 in 2020.
The median age in Pea Ridge township is 75.1 years: 0 years for males, and 0 years for females. For every 100 females there are 88.9 males.