Residential delivery area · California
ZIP Code 91730: Rancho Cucamonga, CA
ZIP code 91730 is in Rancho Cucamonga, California, entirely in San Bernardino County (Census 2020 ZIP-county file). About 72,000 people live there (Census Bureau, ACS 2020-2024), the most populous of Rancho Cucamonga's 4 residential ZIP codes. Median household income is $92,237 (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Rancho Cucamonga · 4 residential ZIPs
- County
- San Bernardino County
- Census places
- Rancho Cucamonga
- Neighborhood
- Rochester GeoNames
- Metro area
- Riverside-San Bernardino-Ontario, CA
- House districts
- CA-35 (65%), CA-33 (29%), CA-28 (6%) 119th Congress, by share of land
- State
- California
- Time zone
- Pacific
- Land area
- 13.7 sq mi · 5,216 people per sq mi
- PO Box ZIPs
- 91729 also use the name Rancho Cucamonga
Where is ZIP code 91730?
91730 centers on 34.100°, -117.581° and covers 13.7 square miles of land plus 0.0 of water. It borders 5 ZIP codes: 91764, 91701, 91786, 91784, 91739.
The map draws ZIP code areas only. For the streets inside 91730, 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 91730 compare with the rest of Rancho Cucamonga?
| Measure | 91730 | In Rancho Cucamonga | In San Bernardino County | In CA |
|---|---|---|---|---|
| People (ACS 2020-2024) | 71,613 | 1st of 4 | 9th of 98 | 54th of 1,802 |
| Median household income | $92k | 4th of 4 | 21st of 62 | 678th of 1,189 |
| Median home value | $616k | 4th of 4 | 14th of 65 | 796th of 1,317 |
Its median household income is higher than in 75% of U.S. residential ZIP codes, and it is denser than 94% 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 91730?
The 2020 Census counted 68,883 people in 91730; the ACS, which samples households over 2020-2024, estimates 71,613. Between the 2010 and 2020 censuses its population grew 2.9% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 71,613
- 2020 Census count
- 68,883+2.9% since 2010 (66,925)
- Households
- 25,836
- Median age
- 36.3
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 91730?
Of the 71,613 people the ACS estimates in 91730, 22.1% are under 18 and 13.2% are 65 or older. The largest group by race and Hispanic origin is Hispanic or Latino (42.5%), then White (not Hispanic) (28.7%).
- Under 1822.1%
- 18 to 6464.7%
- 65 and older13.2%
- Hispanic or Latino42.5%
- White, not Hispanic28.7%
- Asian, not Hispanic13.2%
- Black, not Hispanic9.9%
- Other or two or more5.6%
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 91730 earn?
Median household income is $92,237 (ACS 2020-2024), the 21st highest of the 62 ranked ZIP codes in San Bernardino County. It is not measurably different from 2015-2019 ($89,564 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $92,237
- Income per person
- $41,038
- Below the poverty line
- 10.2%
- Unemployed (of the labor force)
- 6.1%
- Adults 25+ with a bachelor's degree
- 32.6%
- Adjusted gross income per tax return, 2022
- $71,61632,520 returns; wages 80% 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 91730?
FHFA's house price index for 91730, built from repeat sales and appraisals of the same homes, rose 95% from 2015 to 2025 and rose 51% from 2020 to 2025, and moved +0.8% in 2025.
- Median home value (owners' estimate)
- $616,300
- Median gross rent
- $2,299
- Homes owned by their occupants
- 47.3%
- Housing units
- 26,697
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 91730?
3,311 business establishments had a location in this ZIP code in 2023, 432 more than in 2018; the most are in health care and social assistance (ZIP Code Business Patterns).
- Health care and social assistance476
- Professional, scientific, and technical services372
- Wholesale trade333
- Accommodation and food services292
- Retail trade271
- Construction248
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 91730?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 91764 | Ontario | 56,270 | $82k | 2.3 mi |
| 91701 | Rancho Cucamonga | 39,287 | $114k | 2.8 mi |
| 91786 | Upland | 55,829 | $93k | 4.6 mi |
| 91784 | Upland | 26,886 | $154k | 5.1 mi |
| 91739 | Rancho Cucamonga | 41,673 | $143k | 5.3 mi |
| 91737 | Rancho Cucamonga | 22,958 | $122k | 3.8 mi (near) |
| 91761 | Ontario | 62,935 | $101k | 4.5 mi (near) |
| 91762 | Ontario | 64,235 | $84k | 5.8 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.