ZIP Code 61231
Aledo · Mercer, Illinois
61231 is the ZIP code of Aledo in Mercer, Illinois, United States.
- ZIP Code
- 61231
- County
- Mercer
- State
- Illinois
- Country
- United States
Place with ZIP code 61231
| Place | County | Location |
|---|---|---|
| Aledo | Mercer | 41.201, -90.742 |
Nearby ZIP codes
Frequently asked questions
Which places use ZIP code 61231?
Aledo.
Which county and state is 61231 in?
Mercer, Illinois, United States.
Source: GeoNames postal codes (CC BY 4.0), geonames.org, retrieved 2026-10-22. Place coordinates are approximate. Check with the national postal service before sending anything valuable.