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City ZIP codes · California

Walnut Creek, CA ZIP Codes

4 ZIP codes use the postal name Walnut Creek, California (Census 2020 ZCTAs and GeoNames postal codes, October 2026), all residential. Median household income runs from $100,552 in 94595 to $186,225 in 94598, 1.9 times as much (Census Bureau, ACS 2020-2024). Walnut Creek's most populous ZIP code is 94598, with 27,206 people (ACS 2020-2024); 38% of its land is in the city of Walnut Creek.

  • ACS2020-24
  • Census2020
  • GeoNames2026

Where are Walnut Creek's ZIP codes?

94595: $101k median household income94596: $136k median household income94597: $132k median household income94598: $186k median household income9459894596945979459594595: $101k median household income94596: $136k median household income94597: $132k median household income94598: $186k median household income9459894596945979459594595: $101k median household income94596: $136k median household income94597: $132k median household income94598: $186k median household income94598945969459794595
The 4 residential ZIP codes named Walnut Creek, 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 Walnut Creek's ZIP codes?

The highest median household income is in 94598 ($186,225), the lowest in 94595 ($100,552). Home values run from $860,600 in 94595 to $1,339,900 in 94598.

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

All 4 residential ZIP codes of Walnut Creek

Residential ZIP codes with the postal name Walnut Creek, CA, largest first (ACS 2020-2024); sort by any column
County
94598 Contra Costa County 27,206 1,320 $186k $1.34M
94596 Contra Costa County 23,417 3,863 $136k $1.28M
94597 Contra Costa County 23,129 5,707 $132k $1.03M
94595 Contra Costa County 16,988 3,256 $101k $861k

Download the 4 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).

Which counties do Walnut Creek's ZIP codes reach?

Walnut Creek's residential ZIP codes lie in Contra Costa County.

Which places do Walnut Creek's ZIP codes cover?

A postal name is not a city limit. By the Census Bureau's places, Walnut Creek's residential ZIP codes cover Walnut Creek itself and 7 other places, each listed with the ZIP codes that have at least 5% of their land in it or hold most of the place:

  • Acalanes Ridge census-designated 94597
  • Castle Hill census-designated 94595
  • Contra Costa Centre census-designated 94597
  • North Gate census-designated 94598
  • San Miguel census-designated 94596
  • Saranap census-designated 94595
  • Shell Ridge census-designated 94598

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

Which first three digits do Walnut Creek'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 Walnut Creek starts with 945.

Three-digit prefixes of Walnut Creek'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 Walnut Creek's
PrefixSectional centerHereAll codes
945 Oakland, CA (SCF 945) 4 93

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