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City ZIP codes · California

Concord, CA ZIP Codes

8 ZIP codes use the postal name Concord, California (Census 2020 ZCTAs and GeoNames postal codes, October 2026): 4 residential and 4 for PO boxes or a single organization. Median household income runs from $82,479 in 94520 to $125,899 in 94521, 1.5 times as much (Census Bureau, ACS 2020-2024). Concord's most populous ZIP code is 94521, with 41,909 people (ACS 2020-2024); 86% of its land is in the city of Concord.

  • ACS2020-24
  • Census2020
  • GeoNames2026

Where are Concord's ZIP codes?

94518: $112k median household income94519: $122k median household income94520: $83k median household income94521: $126k median household income9452094521945189451994518: $112k median household income94519: $122k median household income94520: $83k median household income94521: $126k median household income9452094521945189451994518: $112k median household income94519: $122k median household income94520: $83k median household income94521: $126k median household income945209452194518
The 4 residential ZIP codes named Concord, 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 Concord's ZIP codes?

The highest median household income is in 94521 ($125,899), the lowest in 94520 ($82,479). Home values run from $601,000 in 94520 to $859,000 in 94518.

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

All 4 residential ZIP codes of Concord

Residential ZIP codes with the postal name Concord, CA, largest first (ACS 2020-2024); sort by any column
County
94521 Contra Costa County 41,909 4,328 $126k $853k
94520 Contra Costa County 37,381 3,787 $83k $601k
94518 Contra Costa County 27,345 4,935 $112k $859k
94519 Contra Costa County 19,058 4,201 $122k $784k

Download the 8 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 Concord

4 ZIP codes named Concord 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.

Concord, CA: ZIP codes without a residential area, for PO boxes or one organization (GeoNames postal codes; USPS does not publish openly which is which)
ZIPCounty
94522Contra Costa County
94524Contra Costa County
94527Contra Costa County
94529Contra Costa County

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

Which counties do Concord's ZIP codes reach?

Concord's residential ZIP codes lie in Contra Costa County.

Which places do Concord's ZIP codes cover?

A postal name is not a city limit. By the Census Bureau's places, Concord's residential ZIP codes cover Concord 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 Concord'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 Concord starts with 945.

Three-digit prefixes of Concord'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 Concord's
PrefixSectional centerHereAll codes
945 Oakland, CA (SCF 945) 8 93

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