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City ZIP codes · California

Alhambra, CA ZIP Codes

6 ZIP codes use the postal name Alhambra, California (Census 2020 ZCTAs and GeoNames postal codes, October 2026): 2 residential and 4 for PO boxes or a single organization. Median household income runs from $84,311 in 91803 to $89,156 in 91801 (Census Bureau, ACS 2020-2024). Alhambra's most populous ZIP code is 91801, with 53,381 people (ACS 2020-2024); 100% of its land is in the city of Alhambra.

  • ACS2020-24
  • Census2020
  • GeoNames2026

Where are Alhambra's ZIP codes?

91801: $89k median household income91803: $84k median household income918019180391801: $89k median household income91803: $84k median household income918019180391801: $89k median household income91803: $84k median household income9180191803
The 2 residential ZIP codes named Alhambra, 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 Alhambra's ZIP codes?

The highest median household income is in 91801 ($89,156), the lowest in 91803 ($84,311). Home values run from $834,000 in 91801 to $888,600 in 91803.

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

All 2 residential ZIP codes of Alhambra

Residential ZIP codes with the postal name Alhambra, CA, largest first (ACS 2020-2024); sort by any column
County
91801 Los Angeles County 53,381 12,345 $89k $834k
91803 Los Angeles County 27,715 8,502 $84k $889k

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 Alhambra

4 ZIP codes named Alhambra 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.

Alhambra, 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
91802Los Angeles County
91804Los Angeles County
91896Los Angeles County
91899Los Angeles County

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

Which counties do Alhambra's ZIP codes reach?

Alhambra's residential ZIP codes lie in Los Angeles County.

Which first three digits do Alhambra'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 Alhambra starts with 918.

Three-digit prefixes of Alhambra'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 Alhambra's
PrefixSectional centerHereAll codes
918 Industry, CA (SCF 917) 6 6

All 6 ZIP codes that start with 918 are Alhambra's: 2 residential codes and 4 PO Box or unique codes, sorted at Industry, CA (SCF 917).

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