In which county is ZIP code 61231 located?

ZIP 61231 is listed under Mercer, IL.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 61231: Aledo, IL

ZIP: 61231

County: Mercer

Coordinates: 41.20080, -90.74160

ZIP Type: Standard

Time Zone: Central Time (CT)

This profile provides an in-depth look at ZIP code 61231, serving Aledo in IL. It lies in Mercer and supports delivery, planning, and address verification.

Primary City	Aledo
ZIP Code	61231
County	Mercer
State	IL
Latitude / Longitude	41.20080, -90.74160
ZIP Type	Standard
Time Zone	Central Time (CT)
Data Updated	2026-01-08

Maps & Useful Links

Open in Maps: Google Maps · OpenStreetMap

These links show the approximate center point for ZIP 61231 (not an exact boundary).

Geographic & Administrative Context

The geographic center of ZIP code 61231 is approximately 41.20080 (latitude) and -90.74160 (longitude). This location sits within Mercer, contributing to regional planning across IL.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 61231 for mail delivery and general location reference in Mercer, IL.

This ZIP may extend beyond the city core into nearby communities within Mercer.

Related ZIP Codes (Nearby)

Explore other postal codes near Aledo within IL.

Frequently Asked Questions

What is the primary city for ZIP code 61231?

The primary city for this ZIP code is Aledo, located in IL.

In which county is 61231 located?

ZIP code 61231 is situated within Mercer, IL.

What are the coordinates for 61231?

The approximate center point is 41.20080 (Latitude) and -90.74160 (Longitude).

Is ZIP code 61231 active?

This page lists ZIP 61231 as Listed based on the latest refresh date shown above.

Does ZIP 61231 cover multiple areas?

Yes. Many ZIP codes cover multiple neighborhoods or nearby areas. For exact boundaries, use official mapping tools.

Methodology & Data Notes

How we build this page: We generate this page from a structured ZIP dataset and refresh key fields (city, county, and coordinates) during scheduled updates. Coordinates represent an approximate center point, not an official boundary map.
Sources: Public ZIP reference datasets and geographic coordinate references. If you use specific sources (e.g., USPS, Census), list them on your About/Methodology page.

Page updated: 2026-01-08