Residential delivery area · California
ZIP Code 91739: Rancho Cucamonga, CA
ZIP code 91739 uses the postal name Rancho Cucamonga, California and lies entirely in San Bernardino County (Census 2020 ZIP-county file). About 42,000 people live there (Census Bureau, ACS 2020-2024), the 2nd most populous of Rancho Cucamonga's 4 residential ZIP codes. Median household income is $143,265 (Census Bureau, ACS 2020-2024). By Census place, 43% of its land lies in Rancho Cucamonga, and under 1% in smaller places; 56% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Rancho Cucamonga · 4 residential ZIPs
- County
- San Bernardino County
- Census places
- Rancho Cucamonga
- Neighborhood
- Etiwanda GeoNames
- Metro area
- Riverside-San Bernardino-Ontario, CA
- House districts
- CA-28 (57%), CA-33 (35%), CA-35 (8%) 119th Congress, by share of land
- State
- California
- Time zone
- Pacific
- Land area
- 28.4 sq mi · 1,466 people per sq mi
- PO Box ZIPs
- 91729 also use the name Rancho Cucamonga
Where is ZIP code 91739?
91739 centers on 34.156°, -117.517° and covers 28.4 square miles of land plus 0.0 of water. It borders 7 ZIP codes: 91737, 92336, 91701, 91730, 92335, 92358, 91764.
The map draws ZIP code areas only. For the streets inside 91739, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0); neighborhoods from the GeoNames gazetteer (CC BY 4.0), placed in this ZIP code by PlainZIP.
How does 91739 compare with the rest of Rancho Cucamonga?
| Measure | 91739 | In Rancho Cucamonga | In San Bernardino County | In CA |
|---|---|---|---|---|
| People (ACS 2020-2024) | 41,673 | 2nd of 4 | 24th of 98 | 355th of 1,802 |
| Median household income | $143k | 1st of 4 | 3rd of 62 | 190th of 1,189 |
| Median home value | $895k | 1st of 4 | 1st of 65 | 441st of 1,317 |
Its median household income is higher than in 95% of U.S. residential ZIP codes, and it is denser than 82% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 91739?
The 2020 Census counted 42,411 people in 91739; the ACS, which samples households over 2020-2024, estimates 41,673. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 41,673
- 2020 Census count
- 42,411
- Households
- 11,990
- Median age
- 37.6
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 91739?
Of the 41,673 people the ACS estimates in 91739, 25.1% are under 18 and 9.4% are 65 or older. The largest group by race and Hispanic origin is Hispanic or Latino (34.5%), then White (not Hispanic) (31.6%).
- Under 1825.1%
- 18 to 6465.5%
- 65 and older9.4%
- Hispanic or Latino34.5%
- White, not Hispanic31.6%
- Asian, not Hispanic20.3%
- Black, not Hispanic9.0%
- Other or two or more4.6%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 91739 earn?
Median household income is $143,265 (ACS 2020-2024), the 3rd highest of the 62 ranked ZIP codes in San Bernardino County.
- Median household income
- $143,265
- Income per person
- $51,916
- Below the poverty line
- 7.0%
- Unemployed (of the labor force)
- 6.0%
- Adults 25+ with a bachelor's degree
- 44.5%
- Adjusted gross income per tax return, 2022
- $120,17617,510 returns; wages 68% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 91739?
FHFA's house price index for 91739, built from repeat sales and appraisals of the same homes, rose 85% from 2015 to 2025 and rose 49% from 2020 to 2025, and moved +1.1% in 2025.
- Median home value (owners' estimate)
- $895,000
- Median gross rent
- $2,535
- Homes owned by their occupants
- 72.3%
- Housing units
- 12,512
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 91739?
961 business establishments had a location in this ZIP code in 2023, 200 more than in 2018; the most are in retail trade (ZIP Code Business Patterns).
- Retail trade154
- Health care and social assistance129
- Accommodation and food services109
- Transportation and warehousing99
- Professional, scientific, and technical services97
- Construction85
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 91739?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 91737 | Rancho Cucamonga | 22,958 | $122k | 3.5 mi |
| 92336 | Fontana | 105,517 | $123k | 3.5 mi |
| 91701 | Rancho Cucamonga | 39,287 | $114k | 4.9 mi |
| 91730 | Rancho Cucamonga | 71,613 | $92k | 5.3 mi |
| 92335 | Fontana | 97,511 | $78k | 5.6 mi |
| 92358 | Lytle Creek | 672 | $86k | 6.9 mi |
| 91764 | Ontario | 56,270 | $82k | 7.6 mi |
| 92377 | Rialto | 20,814 | $116k | 6.5 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.