Plain

City ZIP codes · Iowa

Iowa City, IA ZIP Codes

6 ZIP codes use the postal name Iowa City, Iowa (Census 2020 ZCTAs and GeoNames postal codes, October 2026): 4 residential and 2 for PO boxes or a single organization. Median household income runs from $52,960 in 52240 to $78,020 in 52245, 1.5 times as much (Census Bureau, ACS 2020-2024). Iowa City's most populous ZIP code is 52240, with 35,074 people (ACS 2020-2024); 6% of its land is in the city of Iowa City.

  • ACS2020-24
  • Census2020
  • GeoNames2026

Where are Iowa City's ZIP codes?

52240: $53k median household income52242: – median household income52245: $78k median household income52246: $63k median household income5224052246522455224252240: $53k median household income52242: – median household income52245: $78k median household income52246: $63k median household income52240522465224552240: $53k median household income52242: – median household income52245: $78k median household income52246: $63k median household income522405224652245
The 4 residential ZIP codes named Iowa City, 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 Iowa City's ZIP codes?

The highest median household income is in 52245 ($78,020), the lowest in 52240 ($52,960). Home values run from $242,300 in 52240 to $348,900 in 52246.

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

All 4 residential ZIP codes of Iowa City

Residential ZIP codes with the postal name Iowa City, IA, largest first (ACS 2020-2024); sort by any column
County
52240 Johnson County 35,074 247 $53k $242k
52245 Johnson County 22,853 2,722 $78k $315k
52246 Johnson County 22,308 1,335 $63k $349k
52242 Johnson County 4,688 6,547 – –

Download the 6 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 Iowa City

2 ZIP codes named Iowa City 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.

Iowa City, 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
52243Johnson County
52244Johnson County

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

Which counties do Iowa City's ZIP codes reach?

Iowa City's residential ZIP codes lie in Johnson County.

Which places do Iowa City's ZIP codes cover?

A postal name is not a city limit. By the Census Bureau's places, Iowa City's residential ZIP codes cover Iowa City itself and 1 other place, 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 Iowa City'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 Iowa City starts with 522.

Three-digit prefixes of Iowa City'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 Iowa City's
PrefixSectional centerHereAll codes
522 Cedar Rapids, IA (SCF 522) 6 50

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