Plain

City ZIP codes · California

Rancho Cucamonga, CA ZIP Codes

5 ZIP codes use the postal name Rancho Cucamonga, 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 $92,237 in 91730 to $143,265 in 91739, 1.6 times as much (Census Bureau, ACS 2020-2024). Rancho Cucamonga's most populous ZIP code is 91730, with 71,613 people (ACS 2020-2024); 100% of its land is in the city of Rancho Cucamonga.

  • ACS2020-24
  • Census2020
  • GeoNames2026

Where are Rancho Cucamonga's ZIP codes?

91701: $114k median household income91730: $92k median household income91737: $122k median household income91739: $143k median household income9173991730917019173791701: $114k median household income91730: $92k median household income91737: $122k median household income91739: $143k median household income9173991730917019173791701: $114k median household income91730: $92k median household income91737: $122k median household income91739: $143k median household income91739917309170191737
The 4 residential ZIP codes named Rancho Cucamonga, 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 Rancho Cucamonga's ZIP codes?

The highest median household income is in 91739 ($143,265), the lowest in 91730 ($92,237). Home values run from $616,300 in 91730 to $895,000 in 91739.

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

All 4 residential ZIP codes of Rancho Cucamonga

Residential ZIP codes with the postal name Rancho Cucamonga, CA, largest first (ACS 2020-2024); sort by any column
County
91730 San Bernardino County 71,613 5,216 $92k $616k
91739 San Bernardino County 41,673 1,466 $143k $895k
91701 San Bernardino County 39,287 5,315 $114k $795k
91737 San Bernardino County 22,958 2,275 $122k $878k

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 Rancho Cucamonga

1 ZIP code named Rancho Cucamonga 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.

Rancho Cucamonga, 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
91729San Bernardino County

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

Which counties do Rancho Cucamonga's ZIP codes reach?

Rancho Cucamonga's residential ZIP codes lie in San Bernardino County.

Which first three digits do Rancho Cucamonga'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 Rancho Cucamonga starts with 917.

Three-digit prefixes of Rancho Cucamonga'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 Rancho Cucamonga's
PrefixSectional centerHereAll codes
917 Industry, CA (SCF 917) 5 64

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