ZIP Code 48103

48103 is one of Michigan's ZIP codes, delivering to addresses in Ann Arbor, Washtenaw County.

City: Ann Arbor
County: Washtenaw County
State: Michigan
Prefix: 481xx

Where this code sits

48103 is part of the 481xx range, the group of codes handled by one mail processing centre. Ann Arbor is served by 8 ZIP codes in total; the full list, with the county each falls in, is on the Ann Arbor page.

Ann Arbor Michigan ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 48103 delivers to without sharing its boundary.

734 Area code 734

ZIP codes nearest 48103

The ZIP codes whose reference points sit closest to 48103.
ZIP code	Distance	Delivers to
ZIP code 48109	2.2 mi	Ann Arbor, MI
ZIP code 48104	2.9 mi	Ann Arbor, MI
ZIP code 48106	3.2 mi	Ann Arbor, MI
ZIP code 48107	3.2 mi	Ann Arbor, MI
ZIP code 48113	3.2 mi	Ann Arbor, MI
ZIP code 48105	4.3 mi	Ann Arbor, MI
ZIP code 48108	5.3 mi	Ann Arbor, MI
ZIP code 48176	7.6 mi	Saline, 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 48103, plotted from its record coordinates.

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

Scope ZIP code 48103. 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.