ZIP Code 48858

48858 is one of Michigan's ZIP codes, delivering to addresses in Mount Pleasant, Isabella County.

City: Mount Pleasant
County: Isabella County
State: Michigan
Prefix: 488xx

Where this code sits

48858 is part of the 488xx range, the group of codes handled by one mail processing centre. Mount Pleasant is served by 3 ZIP codes in total; the full list, with the county each falls in, is on the Mount Pleasant page.

Mount Pleasant Michigan ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 48858 delivers to without sharing its boundary.

989 Area code 989

ZIP codes nearest 48858

The ZIP codes whose reference points sit closest to 48858.
ZIP code	Distance	Delivers to
ZIP code 48859	4.5 mi	Mount Pleasant, MI
ZIP code 48804	4.6 mi	Mount Pleasant, MI
ZIP code 48878	5.8 mi	Rosebush, MI
ZIP code 48896	8.4 mi	Winn, MI
ZIP code 48883	9.6 mi	Shepherd, MI
ZIP code 48893	12 mi	Weidman, MI
ZIP code 48832	13 mi	Elwell, MI
ZIP code 48618	14 mi	Coleman, MI

Straight-line distance between place reference points, not driving distance. Where a place has no Census Gazetteer point, its postal centroid is used instead.

Each point is the reference point for 48858, plotted from its record coordinates.

Reference points and footprint
Not an official NANPA boundary
Not a USPS delivery area

Scope ZIP code 48858. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. A ZIP code is a set of delivery routes, not an area; the point shown is a record coordinate, not a centre.