ZIP Code 48059

48059 is one of Michigan's ZIP codes, delivering to addresses in Fort Gratiot, St. Clair County.

City: Fort Gratiot
County: St. Clair County
State: Michigan
Prefix: 480xx

Where this code sits

48059 is part of the 480xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Fort Gratiot.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 48059 delivers to without sharing its boundary.

810 Area code 810

ZIP codes nearest 48059

The ZIP codes whose reference points sit closest to 48059.
ZIP code	Distance	Delivers to
ZIP code 48049	5.7 mi	North Street, MI
ZIP code 48032	6.0 mi	Jeddo, MI
ZIP code 48060	6.6 mi	Port Huron, MI
ZIP code 48061	8.8 mi	Port Huron, MI
ZIP code 48006	10 mi	Avoca, MI
ZIP code 48450	11 mi	Lexington, MI
ZIP code 48040	12 mi	Marysville, MI
ZIP code 48074	13 mi	Smiths Creek, 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 48059, plotted from its record coordinates.

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

Scope ZIP code 48059. 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.