In which county is ZIP code 48028 located?

ZIP 48028 is listed under St. Clair, MI.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 48028: Harsens Island, MI

ZIP: 48028

County: St. Clair

Coordinates: 42.58500, -82.58600

ZIP Type: Standard

Time Zone: Eastern Time (ET)

This profile provides an in-depth look at ZIP code 48028, serving Harsens Island in MI. It lies in St. Clair and supports delivery, planning, and address verification.

Primary City	Harsens Island
ZIP Code	48028
County	St. Clair
State	MI
Latitude / Longitude	42.58500, -82.58600
ZIP Type	Standard
Time Zone	Eastern Time (ET)
Data Updated	2026-01-08

Maps & Useful Links

Open in Maps: Google Maps · OpenStreetMap

These links show the approximate center point for ZIP 48028 (not an exact boundary).

Geographic & Administrative Context

Coordinates for 48028 are listed as 42.58500 / -82.58600, useful for GPS and service checks in and around Harsens Island, MI.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 48028 for mail delivery and general location reference in St. Clair, MI.

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

Related ZIP Codes (Nearby)

Explore other postal codes near Harsens Island within MI.

Frequently Asked Questions

What is the primary city for ZIP code 48028?

The primary city for this ZIP code is Harsens Island, located in MI.

In which county is 48028 located?

ZIP code 48028 is situated within St. Clair, MI.

What are the coordinates for 48028?

The approximate center point is 42.58500 (Latitude) and -82.58600 (Longitude).

Is ZIP code 48028 active?

This page lists ZIP 48028 as Listed based on the latest refresh date shown above.

Does ZIP 48028 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