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City ZIP codes · California

San Ramon, CA ZIP Codes

2 ZIP codes use the postal name San Ramon, California (Census 2020 ZCTAs and GeoNames postal codes, October 2026), all residential. Median household income runs from $184,898 in 94583 to $214,677 in 94582 (Census Bureau, ACS 2020-2024). San Ramon's most populous ZIP code is 94582, with 47,424 people (ACS 2020-2024); 77% of its land is in the city of San Ramon.

  • ACS2020-24
  • Census2020
  • GeoNames2026

Where are San Ramon's ZIP codes?

94582: $215k median household income94583: $185k median household income945839458294582: $215k median household income94583: $185k median household income945839458294582: $215k median household income94583: $185k median household income9458394582
The 2 residential ZIP codes named San Ramon, 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 San Ramon's ZIP codes?

The highest median household income is in 94582 ($214,677), the lowest in 94583 ($184,898). Home values run from $1,383,600 in 94583 to $1,635,700 in 94582.

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

All 2 residential ZIP codes of San Ramon

Residential ZIP codes with the postal name San Ramon, CA, largest first (ACS 2020-2024); sort by any column
County
94582 Contra Costa County 47,424 3,536 $215k $1.64M
94583 Contra Costa County 39,583 1,864 $185k $1.38M

Download the 2 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 San Ramon's ZIP codes reach?

San Ramon's residential ZIP codes lie in Contra Costa County.

Which places do San Ramon's ZIP codes cover?

A postal name is not a city limit. By the Census Bureau's places, San Ramon's residential ZIP codes cover San Ramon 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:

  • Norris Canyon census-designated 94583

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

Which first three digits do San Ramon'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 San Ramon starts with 945.

Three-digit prefixes of San Ramon'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 San Ramon's
PrefixSectional centerHereAll codes
945 Oakland, CA (SCF 945) 2 93

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