Residential delivery area · California
ZIP Code 91737: Rancho Cucamonga, CA
ZIP code 91737 is in Rancho Cucamonga, California, entirely in San Bernardino County (Census 2020 ZIP-county file). About 23,000 people live there (Census Bureau, ACS 2020-2024), the least populous of Rancho Cucamonga's 4 residential ZIP codes. Median household income is $122,334 (Census Bureau, ACS 2020-2024). By Census place, 63% of its land lies in Rancho Cucamonga; 37% 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
- Metro area
- Riverside-San Bernardino-Ontario, CA
- House districts
- CA-28 (96%), CA-33 (4%) 119th Congress, by share of land
- State
- California
- Time zone
- Pacific
- Land area
- 10.1 sq mi · 2,275 people per sq mi
- PO Box ZIPs
- 91729 also use the name Rancho Cucamonga
Where is ZIP code 91737?
91737 centers on 34.155°, -117.578° and covers 10.1 square miles of land. It borders 3 ZIP codes: 91701, 91739, 92358.
The map draws ZIP code areas only. For the streets inside 91737, 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).
How does 91737 compare with the rest of Rancho Cucamonga?
| Measure | 91737 | In Rancho Cucamonga | In San Bernardino County | In CA |
|---|---|---|---|---|
| People (ACS 2020-2024) | 22,958 | 4th of 4 | 40th of 98 | 764th of 1,802 |
| Median household income | $122k | 2nd of 4 | 6th of 62 | 334th of 1,189 |
| Median home value | $878k | 2nd of 4 | 3rd of 65 | 455th of 1,317 |
Its median household income is higher than in 91% of U.S. residential ZIP codes, and it is denser than 86% 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 91737?
The 2020 Census counted 24,568 people in 91737; the ACS, which samples households over 2020-2024, estimates 22,958. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 22,958
- 2020 Census count
- 24,568
- Households
- 7,995
- Median age
- 44.8
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 91737?
Of the 22,958 people the ACS estimates in 91737, 20.1% are under 18 and 19.8% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (41.9%), then Hispanic or Latino (32.8%).
- Under 1820.1%
- 18 to 6460.0%
- 65 and older19.8%
- White, not Hispanic41.9%
- Hispanic or Latino32.8%
- Asian, not Hispanic14.2%
- Black, not Hispanic6.4%
- 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 91737 earn?
Median household income is $122,334 (ACS 2020-2024), the 6th highest of the 62 ranked ZIP codes in San Bernardino County.
- Median household income
- $122,334
- Income per person
- $58,193
- Below the poverty line
- 8.6%
- Unemployed (of the labor force)
- 6.4%
- Adults 25+ with a bachelor's degree
- 41.4%
- Adjusted gross income per tax return, 2022
- $118,64111,390 returns; wages 62% 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 91737?
FHFA's house price index for 91737, built from repeat sales and appraisals of the same homes, rose 81% from 2015 to 2025 and rose 46% from 2020 to 2025, and moved +3.3% in 2025.
- Median home value (owners' estimate)
- $878,400
- Median gross rent
- $2,371
- Homes owned by their occupants
- 71.1%
- Housing units
- 8,340
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 91737?
393 business establishments had a location in this ZIP code in 2023, 49 more than in 2018; the most are in health care and social assistance (ZIP Code Business Patterns).
- Health care and social assistance60
- Construction54
- Professional, scientific, and technical services41
- Transportation and warehousing33
- Other services (except public administration)30
- Retail trade27
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 91737?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 91701 | Rancho Cucamonga | 39,287 | $114k | 1.7 mi |
| 91739 | Rancho Cucamonga | 41,673 | $143k | 3.5 mi |
| 92358 | Lytle Creek | 672 | $86k | 6.3 mi |
| 91730 | Rancho Cucamonga | 71,613 | $92k | 3.8 mi (near) |
| 91784 | Upland | 26,886 | $154k | 4.5 mi (near) |
| 91764 | Ontario | 56,270 | $82k | 5.8 mi (near) |
| 91786 | Upland | 55,829 | $93k | 5.9 mi (near) |
| 92336 | Fontana | 105,517 | $123k | 6.9 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.