In which county is ZIP code 61436 located?

ZIP 61436 is listed under Knox, IL.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 61436: Gilson, IL

ZIP: 61436

County: Knox

Coordinates: 40.87650, -90.17470

ZIP Type: Standard

Time Zone: Central Time (CT)

This profile provides an in-depth look at ZIP code 61436, serving Gilson in IL. It lies in Knox and supports delivery, planning, and address verification.

Primary City	Gilson
ZIP Code	61436
County	Knox
State	IL
Latitude / Longitude	40.87650, -90.17470
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 61436 (not an exact boundary).

Geographic & Administrative Context

The geographic center of ZIP code 61436 is approximately 40.87650 (latitude) and -90.17470 (longitude). This location sits within Knox, contributing to regional planning across IL.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 61436 for mail delivery and general location reference in Knox, IL.

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

Related ZIP Codes (Nearby)

Explore other postal codes near Gilson within IL.

Frequently Asked Questions

What is the primary city for ZIP code 61436?

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

In which county is 61436 located?

ZIP code 61436 is situated within Knox, IL.

What are the coordinates for 61436?

The approximate center point is 40.87650 (Latitude) and -90.17470 (Longitude).

Is ZIP code 61436 active?

This page lists ZIP 61436 as Listed based on the latest refresh date shown above.

Does ZIP 61436 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