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City ZIP codes · California

Napa, CA ZIP Codes

3 ZIP codes use the postal name Napa, 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 $105,188 in 94559 to $113,269 in 94558 (Census Bureau, ACS 2020-2024). Napa's most populous ZIP code is 94558, with 63,657 people (ACS 2020-2024); 3% of its land is in the city of Napa.

  • ACS2020-24
  • Census2020
  • GeoNames2026

Where are Napa's ZIP codes?

94558: $113k median household income94559: $105k median household income945589455994558: $113k median household income94559: $105k median household income945589455994558: $113k median household income94559: $105k median household income9455894559
The 2 residential ZIP codes named Napa, 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 Napa's ZIP codes?

The highest median household income is in 94558 ($113,269), the lowest in 94559 ($105,188). Home values run from $890,500 in 94558 to $898,600 in 94559.

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

All 2 residential ZIP codes of Napa

Residential ZIP codes with the postal name Napa, CA, largest first (ACS 2020-2024); sort by any column
County
94558 Napa County 63,657 158 $113k $891k
94559 Napa County 27,714 666 $105k $899k

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 Napa

1 ZIP code named Napa 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.

Napa, 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
94581Napa County

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

Which counties do Napa's ZIP codes reach?

Napa's residential ZIP codes lie in Napa County.

Which places do Napa's ZIP codes cover?

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

  • Moskowite Corner census-designated 94558
  • Oakville census-designated 94558
  • Silverado Resort census-designated 94558

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

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

Three-digit prefixes of Napa'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 Napa's
PrefixSectional centerHereAll codes
945 Oakland, CA (SCF 945) 3 93

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