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City ZIP codes · California

Fremont, CA ZIP Codes

5 ZIP codes use the postal name Fremont, California (Census 2020 ZCTAs and GeoNames postal codes, October 2026): 4 residential and 1 for PO boxes or a single organization. Median household income runs from $147,301 in 94538 to $243,552 in 94539, 1.7 times as much (Census Bureau, ACS 2020-2024). Fremont's most populous ZIP code is 94536, with 70,619 people (ACS 2020-2024); 100% of its land is in the city of Fremont.

  • ACS2020-24
  • Census2020
  • GeoNames2026

Where are Fremont's ZIP codes?

94536: $168k median household income94538: $147k median household income94539: $244k median household income94555: $220k median household income9453994538945559453694536: $168k median household income94538: $147k median household income94539: $244k median household income94555: $220k median household income9453994538945559453694536: $168k median household income94538: $147k median household income94539: $244k median household income94555: $220k median household income94539945389455594536
The 4 residential ZIP codes named Fremont, 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 Fremont's ZIP codes?

The highest median household income is in 94539 ($243,552), the lowest in 94538 ($147,301). Home values run from $1,136,600 in 94538 to $1,950,900 in 94539.

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

All 4 residential ZIP codes of Fremont

Residential ZIP codes with the postal name Fremont, CA, largest first (ACS 2020-2024); sort by any column
County
94536 Alameda County 70,619 5,017 $168k $1.29M
94538 Alameda County 67,781 4,098 $147k $1.14M
94539 Alameda County 52,396 2,090 $244k $1.95M
94555 Alameda County 37,501 2,707 $220k $1.38M

Download the 5 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 Fremont

1 ZIP code named Fremont 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.

Fremont, 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
94537Alameda County

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

Which counties do Fremont's ZIP codes reach?

Fremont's residential ZIP codes lie in Alameda County.

Which first three digits do Fremont'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 Fremont starts with 945.

Three-digit prefixes of Fremont'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 Fremont's
PrefixSectional centerHereAll codes
945 Oakland, CA (SCF 945) 5 93

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