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City ZIP codes · Iowa

Dubuque, IA ZIP Codes

5 ZIP codes use the postal name Dubuque, Iowa (Census 2020 ZCTAs and GeoNames postal codes, October 2026): 3 residential and 2 for PO boxes or a single organization. Median household income runs from $61,643 in 52001 to $98,908 in 52003, 1.6 times as much (Census Bureau, ACS 2020-2024). Dubuque's most populous ZIP code is 52001, with 43,101 people (ACS 2020-2024); 50% of its land is in the city of Dubuque.

  • ACS2020-24
  • Census2020
  • GeoNames2026

Where are Dubuque's ZIP codes?

52001: $62k median household income52002: $91k median household income52003: $99k median household income52003520015200252001: $62k median household income52002: $91k median household income52003: $99k median household income52003520015200252001: $62k median household income52002: $91k median household income52003: $99k median household income520035200152002
The 3 residential ZIP codes named Dubuque, shaded by median household income in national fifths (ACS 2020-2024). Select a ZIP to open it. <$54.1k$98.1k+no figure

Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).

How different are Dubuque's ZIP codes?

The highest median household income is in 52003 ($98,908), the lowest in 52001 ($61,643). Home values run from $178,000 in 52001 to $298,900 in 52002.

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013, B25077, B01003).

All 3 residential ZIP codes of Dubuque

Residential ZIP codes with the postal name Dubuque, IA, largest first (ACS 2020-2024); sort by any column
County
52001 Dubuque County 43,101 1,650 $62k $178k
52002 Dubuque County 17,005 583 $91k $299k
52003 Dubuque County 13,796 245 $99k $286k

Download the 5 ZIP codes as CSV

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; 2023 Gazetteer land areas (2020 ZCTAs); town names from simplemaps US ZIP Codes (CC BY 4.0) and GeoNames (CC BY 4.0).

PO Box and single-organization ZIP codes in Dubuque

2 ZIP codes named Dubuque have no residential delivery area: post office boxes, or one organization (a large employer, an agency, a university) with its own code. The Census Bureau publishes no figures for them.

Dubuque, IA: ZIP codes without a residential area, for PO boxes or one organization (GeoNames postal codes; USPS does not publish openly which is which)
ZIPCounty
52004Dubuque County
52099Dubuque County

Source: GeoNames postal codes (CC BY 4.0); a ZIP code with no Census ZCTA has no residential delivery area.

Which counties do Dubuque's ZIP codes reach?

Dubuque's residential ZIP codes lie in Dubuque County.

Which places do Dubuque's ZIP codes cover?

A postal name is not a city limit. By the Census Bureau's places, Dubuque's residential ZIP codes cover Dubuque itself and 2 other places, each listed with the ZIP codes that have at least 5% of their land in it or hold most of the place:

Source: U.S. Census Bureau, 2020 ZCTA-to-place relationship file (shares of land).

Which first three digits do Dubuque's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Every ZIP code of Dubuque starts with 520.

Three-digit prefixes of Dubuque's ZIP codes, the sectional center for each (USPS labeling list L005, effective October 1, 2026) and how many of the prefix's codes are Dubuque's
PrefixSectional centerHereAll codes
520 Cedar Rapids, IA (SCF 522) 5 46

Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.