Dubuque County ZIP Codes

Dubuque County is a county of Iowa.

ZIP codes: 18
Cities & towns: 14
Area codes: 1
Land area: 608 sq mi

Every ZIP code in Dubuque County

520xx

The complete list of Dubuque County, IA ZIP codes with the city each one delivers to.
ZIP code	City
52001	Dubuque
52002	Dubuque
52003	Dubuque
52004	Dubuque
52032	Bernard
52033	Cascade
52039	Durango
52040	Dyersville
52045	Epworth
52046	Farley
52053	Holy Cross
52056	Luxemburg
52065	New Vienna
52068	Peosta
52073	Sherrill
52078	Worthington
52079	Zwingle
52099	Dubuque

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP. USPS delivery-type products are licensed, and no clean-rights source maps ZIP codes to neighbourhoods — so the Dubuque County codes above are listed without a column we would have to invent.

Cities and towns in Dubuque County

Area codes covering Dubuque County

Telephone and postal boundaries are drawn by different bodies, so these codes overlap the county without matching its edges.

563 Area code 563

Where Dubuque County's ZIP codes sit

Each point is the reference point of one Dubuque County ZIP code, plotted from its record coordinates. The outline is the convex envelope of those points — a footprint, not a boundary.

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

Scope every ZIP code recorded in Dubuque County. Source GeoNames US postal codes (2026-07 postal dump), Census 2024 county Gazetteer (2024 Gazetteer) and geoinfo-dataset (full_dataset) ZIP→NPA (2018 snapshot). Updated 16 July 2026. The outline is a convex envelope of ZIP reference points, not a jurisdiction boundary.