In which county is ZIP code 83428 located?

ZIP 83428 is listed under Bonneville, ID.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 83428: Irwin, ID

ZIP: 83428

County: Bonneville

Coordinates: 43.38610, -111.25270

ZIP Type: Standard

Time Zone: Mountain Time (MT)

Get a reliable snapshot of the Irwin, ID postal area 83428. This page summarizes county, coordinates, and local facts to help with services and location research.

Primary City	Irwin
ZIP Code	83428
County	Bonneville
State	ID
Latitude / Longitude	43.38610, -111.25270
ZIP Type	Standard
Time Zone	Mountain Time (MT)
Data Updated	2026-01-08

Maps & Useful Links

Open in Maps: Google Maps · OpenStreetMap

These links show the approximate center point for ZIP 83428 (not an exact boundary).

Geographic & Administrative Context

The geographic center of ZIP code 83428 is approximately 43.38610 (latitude) and -111.25270 (longitude). This location sits within Bonneville, contributing to regional planning across ID.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 83428 for mail delivery and general location reference in Bonneville, ID.

Some addresses near Irwin may share this ZIP due to delivery routing and local service areas.

Related ZIP Codes (Nearby)

Explore other postal codes near Irwin within ID.

Frequently Asked Questions

What is the primary city for ZIP code 83428?

The primary city for this ZIP code is Irwin, located in ID.

In which county is 83428 located?

ZIP code 83428 is situated within Bonneville, ID.

What are the coordinates for 83428?

The approximate center point is 43.38610 (Latitude) and -111.25270 (Longitude).

Is ZIP code 83428 active?

This page lists ZIP 83428 as Listed based on the latest refresh date shown above.

Does ZIP 83428 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