In which county is ZIP code 61770 located?

ZIP 61770 is listed under McLean, IL.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 61770: Saybrook, IL

ZIP: 61770

County: McLean

Coordinates: 40.43200, -88.52470

ZIP Type: Standard

Time Zone: Central Time (CT)

This profile provides an in-depth look at ZIP code 61770, serving Saybrook in IL. It lies in McLean and supports delivery, planning, and address verification.

Primary City	Saybrook
ZIP Code	61770
County	McLean
State	IL
Latitude / Longitude	40.43200, -88.52470
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 61770 (not an exact boundary).

Geographic & Administrative Context

The geographic center of ZIP code 61770 is approximately 40.43200 (latitude) and -88.52470 (longitude). This location sits within McLean, contributing to regional planning across IL.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 61770 for mail delivery and general location reference in McLean, IL.

Coverage may include nearby neighborhoods and adjacent unincorporated areas commonly associated with Saybrook.

Related ZIP Codes (Nearby)

Explore other postal codes near Saybrook within IL.

Frequently Asked Questions

What is the primary city for ZIP code 61770?

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

In which county is 61770 located?

ZIP code 61770 is situated within McLean, IL.

What are the coordinates for 61770?

The approximate center point is 40.43200 (Latitude) and -88.52470 (Longitude).

Is ZIP code 61770 active?

This page lists ZIP 61770 as Listed based on the latest refresh date shown above.

Does ZIP 61770 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