ZIP Code 48603

48603 is one of Michigan's ZIP codes, delivering to addresses in Saginaw, Saginaw County.

City: Saginaw
County: Saginaw County
State: Michigan
Prefix: 486xx

Where this code sits

48603 is part of the 486xx range, the group of codes handled by one mail processing centre. Saginaw is served by 11 ZIP codes in total; the full list, with the county each falls in, is on the Saginaw page.

Saginaw Michigan ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 48603 delivers to without sharing its boundary.

989 Area code 989

ZIP codes nearest 48603

The ZIP codes whose reference points sit closest to 48603.
ZIP code	Distance	Delivers to
ZIP code 48605	1.1 mi	Saginaw, MI
ZIP code 48638	2.2 mi	Saginaw, MI
ZIP code 48602	3.8 mi	Saginaw, MI
ZIP code 48604	4.0 mi	Saginaw, MI
ZIP code 48663	5.0 mi	Saginaw, MI
ZIP code 48724	5.0 mi	Carrollton, MI
ZIP code 48607	5.4 mi	Saginaw, MI
ZIP code 48609	6.1 mi	Saginaw, 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 48603, plotted from its record coordinates.

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

Scope ZIP code 48603. 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.