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City ZIP codes · California

Los Altos, CA ZIP Codes

3 ZIP codes use the postal name Los Altos, California (Census 2020 ZCTAs and GeoNames postal codes, October 2026): 2 residential and 1 for PO boxes or a single organization. Median household income runs from $250,000 or more in 94024 to $250,000 or more in 2 ZIP codes at the Census top code (Census Bureau, ACS 2020-2024). Los Altos's most populous ZIP code is 94024, with 23,051 people (ACS 2020-2024); 46% of its land is in the city of Los Altos.

  • ACS2020-24
  • Census2020
  • GeoNames2026

Where are Los Altos's ZIP codes?

94022: $250k+ median household income94024: $250k+ median household income940229402494022: $250k+ median household income94024: $250k+ median household income940229402494022: $250k+ median household income94024: $250k+ median household income9402294024
The 2 residential ZIP codes named Los Altos, 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 Los Altos's ZIP codes?

The highest median household income is in 94022 ($250,000 or more), the lowest in 94024 ($250,000 or more). Home values run from $2,000,000 or more in 94024 to $2,000,000 or more in 94022.

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

All 2 residential ZIP codes of Los Altos

Residential ZIP codes with the postal name Los Altos, CA, largest first (ACS 2020-2024); sort by any column
County
94024 Santa Clara County 23,051 2,786 $250k+ $2M+
94022 Santa Clara County 20,027 1,132 $250k+ $2M+

Download the 3 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 Los Altos

1 ZIP code named Los Altos has 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.

Los Altos, 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
94023Santa Clara County

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

Which counties do Los Altos's ZIP codes reach?

Los Altos's residential ZIP codes lie in Santa Clara County.

Which places do Los Altos's ZIP codes cover?

A postal name is not a city limit. By the Census Bureau's places, Los Altos's residential ZIP codes cover Los Altos itself and 3 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 Los Altos'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 Los Altos starts with 940.

Three-digit prefixes of Los Altos'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 Los Altos's
PrefixSectional centerHereAll codes
940 San Francisco, CA (SCF 940) 3 45

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