91730 ZIP Code, Rancho Cucamonga, CA

91730 is a ZIP code in Rancho Cucamonga, California in San Bernardino County. It covers 14 square miles of land. The closest ZIP codes are 91764, 91701 and 91737. 71,613 people live here in 25,836 households, more than in 9 of every 10 California ZIP codes. At about 5,216 people per square mile it is built up to city-neighborhood density, and owners and renters are mixed (47% own). Median household income is $92,237, close to the California median of $99,122.

Quick facts

Key figures

MeasureValue
Residents71,613
Households25,836
Median household income$92,237
Income per person$41,038
Median age36.3
Homeowners47.3%
Median home value$616,300
Median rent$2,299
Bachelor's degree or higher32.6%
Average commute (minutes)32.6
Households with kids under 1831.8%
Moved in the past year11.2%
Below the poverty line10.2%
Broadband internet93.7%
Speak a non-English language at home36.7%

Household income

% of householdsValue
<$10K4.5%
$10–15K2.3%
$15–25K4.8%
$25–35K7.2%
$35–50K8.0%
$50–75K13.0%
$75–100K14.7%
$100–150K19.4%
$150–200K12.6%
$200K+13.5%

Age

% of all residentsValue
<1012.7%
10–1912.0%
20–245.5%
25–3417.9%
35–4414.5%
45–5412.4%
55–6411.8%
65–748.5%
75+4.6%

Tenure

% of housing unitsValue
Owned, with mortgage33.1%
Owned outright12.9%
Rented50.8%
Vacant3.2%

Type of building

% of housing unitsValue
Detached house45.4%
Townhome12.0%
2–4 units7.2%
5–19 units11.5%
20+ units21.8%
Mobile / other2.0%

Businesses in 91730

3,311 business establishments with 51,205 employees (ZIP Codes Business Patterns 2023).

EDDM carrier routes

91730 has 37 USPS carrier routes with 26,895 residential and 4,198 business mailboxes. Open the EDDM route map.

Carrier routes in 91730

91730 has 37 USPS carrier routes (37 city (C)) with 26,895 residential and 4,198 business mailboxes. Routes range from 80 homes (C090) to 1,846 homes (C074); the median route has 709 homes. The Census counted 25,836 households in 91730 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per routeRoutes
1–2492
250–4999
500–74911
750–9997
1,000–1,4997
1,500+1

Best routes in 91730 for…

Most businesses

For B2B offers: office supplies, cleaning, IT, catering and commercial services.

  1. Route C017 — USPS business mailboxes 297, 467 homes
  2. Route C086 — USPS business mailboxes 293, 367 homes
  3. Route C065 — USPS business mailboxes 287, 716 homes
  4. Route C064 — USPS business mailboxes 279, 784 homes
  5. Route C075 — USPS business mailboxes 265, 1,272 homes

Select these 5 routes on the route map

Every carrier route in 91730

RouteTypeHomesBusinessesEst. median incomeEst. ownersEst. families with kidsEst. moved in past year
C002City474168$94,431———
C003City6068$139,472———
C004City69335$139,472———
C005City524119$139,472———
C006City4910$138,130———
C007City73280$138,130———
C012City1,03224$29,616———
C013City73022$75,069———
C014City42185$125,664———
C015City45153$90,720———
C016City1,28957$40,388———
C017City467297$91,901———
C018City6507$77,521———
C061City70940$85,231———
C062City264214$85,032———
C063City318264$85,032———
C064City784279$85,032———
C065City716287$75,541———
C066City83870$79,543———
C067City1,0350$99,721———
C070City67420$92,546———
C071City867204$85,032———
C072City1,0332$79,543———
C073City1,17620$75,069———
C074City1,84620$84,067———
C075City1,272265$51,728———
C076City179244$85,032———
C077City78648$75,069———
C079City85124$51,728———
C081City1,10740$85,032———
C082City893216$118,121———
C084City959242$40,388———
C086City367293$112,813———
C087City63311$75,069———
C088City323238$135,448———
C089City625165$125,664———
C090City8037$76,459———

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 91730 on the EDDM route map.

How route demographics are estimated

Mailbox counts come from USPS; demographics are estimates

The number of homes and businesses on each carrier route is the current USPS EDDM count. The Census Bureau does not publish figures for carrier routes, so income, homeownership, ages, families, movers and housing age on a route are EDDM2GO estimates built from Census block groups (neighborhood areas of roughly 600 to 3,000 people).

How a route gets its figures: the block-group length-share method

We trace each route's streets every 25 meters and record which block group each stretch falls in. The route's homes are spread along its streets in proportion to length, so a route with 60% of its street length in one block group is assumed to have 60% of its homes there. Each block group then contributes its Census counts in proportion to the share of its housing units that sit on the route (capped at the whole block group). Medians are recalculated from the combined income, home-value and age brackets, the way the Census Bureau computes them, not averaged.

Margins of error

Census survey figures carry a margin of error at 90% confidence; we carry it through the calculation and show it as ±. Our margins treat the route-to-block-group split as exact, so the real uncertainty is larger. Routes with fewer than 100 estimated households, large margins, or streets we could not place are flagged.

Different years

USPS mailbox counts are current. Census figures are 5-year averages for 2020–2024, so a new subdivision may have more homes on the route today than the Census counted. Use the route figures to compare routes with each other, not as an exact head count.

Why some routes show identical figures

Two routes that run through the same block group get the same percentages and medians, because the Census publishes one set of figures for the whole block group. Their mailbox counts still differ, and those are exact.

Route and mailbox counts: USPS EDDM route data. Route demographics: EDDM2GO estimates from U.S. Census Bureau American Community Survey 5-year block-group data (2020–2024) and 2024 cartographic block-group boundaries. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.

Nearby ZIP codes

Areas that include 91730

Where it ranks

Mail every home in 91730

Route counts on this page price as Full Service 6.5 × 9 postcards: we print, bundle by carrier route and hand the mailing to USPS. Prefer to take it to the Post Office yourself? Print only costs less and you pay postage at drop-off.

EDDM guides

ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 91730, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 91730 in?
91730 is a Rancho Cucamonga, CA mailing address. By land area, 100% lies inside Rancho Cucamonga.
What county is 91730 in?
91730 is in San Bernardino County.
What is the population of 91730?
About 71,613 people (±2,203), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 68,883.
What is the median household income in 91730?
$92,237 (±$4,678), compared with $99,122 for California as a whole. Half the households in the ZIP code earn more and half earn less.
How many carrier routes and mailboxes are in 91730?
37 USPS carrier routes with 26,895 residential and 4,198 business mailboxes (31,092 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 91730?
The closest, measured center to center: 91764 (2.3 mi, Ontario), 91701 (2.8 mi, Rancho Cucamonga), 91737 (3.8 mi, Rancho Cucamonga), 91761 (4.5 mi, Ontario), 91786 (4.6 mi, Upland) and 91784 (5.1 mi, Upland).

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.