ZIP Code 52003

52003 is one of Iowa's ZIP codes, delivering to addresses in Dubuque, Dubuque County.

City: Dubuque
County: Dubuque County
State: Iowa
Prefix: 520xx

Where this code sits

52003 is part of the 520xx range, the group of codes handled by one mail processing centre. Dubuque is served by 5 ZIP codes in total; the full list, with the county each falls in, is on the Dubuque page.

Dubuque Iowa ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 52003 delivers to without sharing its boundary.

563 Area code 563

ZIP codes nearest 52003

The ZIP codes whose reference points sit closest to 52003.
ZIP code	Distance	Delivers to
ZIP code 52004	2.6 mi	Dubuque, IA
ZIP code 52099	2.6 mi	Dubuque, IA
ZIP code 52001	3.5 mi	Dubuque, IA
ZIP code 61025	4.3 mi	East Dubuque, IL
ZIP code 52002	4.3 mi	Dubuque, IA
ZIP code 52068	6.6 mi	Peosta, IA
ZIP code 53824	8.4 mi	Sinsinawa, WI
ZIP code 53812	9.0 mi	Kieler, WI

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 52003, plotted from its record coordinates.

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

Scope ZIP code 52003. 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.