In which county is ZIP code 48191 located?

ZIP 48191 is listed under Washtenaw, MI.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 48191: Willis, MI

ZIP: 48191

County: Washtenaw

Coordinates: 42.12920, -83.56870

ZIP Type: Standard

Time Zone: Eastern Time (ET)

Get a reliable snapshot of the Willis, MI postal area 48191. This page summarizes county, coordinates, and local facts to help with services and location research.

Primary City	Willis
ZIP Code	48191
County	Washtenaw
State	MI
Latitude / Longitude	42.12920, -83.56870
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 48191 (not an exact boundary).

Geographic & Administrative Context

Coordinates for 48191 are listed as 42.12920 / -83.56870, useful for GPS and service checks in and around Willis, MI.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 48191 for mail delivery and general location reference in Washtenaw, MI.

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

Related ZIP Codes (Nearby)

Explore other postal codes near Willis within MI.

Frequently Asked Questions

What is the primary city for ZIP code 48191?

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

In which county is 48191 located?

ZIP code 48191 is situated within Washtenaw, MI.

What are the coordinates for 48191?

The approximate center point is 42.12920 (Latitude) and -83.56870 (Longitude).

Is ZIP code 48191 active?

This page lists ZIP 48191 as Listed based on the latest refresh date shown above.

Does ZIP 48191 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