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ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — ZIP/91701

91701

ZIP 91701 is in Rancho Cucamonga, California, in San Bernardino County; area codes 909 and 840; Pacific time. Rancho Cucamonga has 5 ZIP codes; the others are 91729, 91730, 91737 and 91739.

Type
Standard
Time zone
America/Los_Angeles
Population
39,287
Coordinates
34.1378, -117.6003
☼ Live from 91701 — Rancho Cucamonga, CA

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Local time: —

Where 91701 is

Approximate ZIP boundary (Census ZCTA 2020). ZIP codes are mail routes, not areas, so the shape shown is the Census tabulation area that approximates it.

★ Weird and wonderful facts about 91701
  • 🔢 Type 91701 into a pocket calculator and turn it upside down: IOLIG — not quite a word, sorry.
  • ➕ As a number, 91,701 = 3 × 3 × 23 × 443. Its digits add up to 18, a total 2,332 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10110011000110101
  • 🏠 Its numerical neighbours: 91618 (North Hollywood, CA, 45 mi away) and 91702 (Azusa, CA, 15 mi away).
  • 🔄 Backwards, 91701 becomes 10719, which is not a ZIP code at all.
  • 👥 32 other ZIP codes are made of exactly the same digits (01719, 01971, 07191, 09171, 10179, 10917, …). The farthest-flung twin is 09171 in APO AE, a military post office, 5,631 miles away.
  • 🧭 Farther south than 78% of all ZIP codes, and farther west than 90%.
  • 🎯1,118 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 91701 and you would come out at 34.14°S, 62.40°E — 1,009 miles from Saint-Denis, Reunion, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 26m of daylight. Shortest: 9h 52m.
  • 📏 At 7.4 square miles of land, 91701 is bigger than 23% of ZIP codes — room for about 5.6 Central Parks.
🌙 The sky over 91701 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population39,287This ZIP39,287
Households13,054This ZIP13,054
Housing units13,370This ZIP13,370
Median age42.4This ZIP42.4California37.9US 38.9
Median household income$114,244This ZIP$114,244California$99,122US $80,734
Median home value$795,300This ZIP$795,300California$734,700US $332,700
Median gross rent$2,416This ZIP$2,416California$2,036US $1,413
Bachelor's degree or higher37.1%This ZIP37.1%
Mean commute31.9 minThis ZIP31.9 min
Population density5,314.8 / sq miThis ZIP5,314.8 / sq mi

Business and tax activity

Business establishments642This ZIP642
Employees3,424This ZIP3,424
Annual payroll$139,889,000This ZIP$139,889,000
Tax returns filed18,880This ZIP18,880
Total adjusted gross income$1,758,144,000This ZIP$1,758,144,000

Land area

Land area7.39 sq miThis ZIP7.39 sq mi
Water area0.00 sq mi

Other place names in 91701

Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.

ZIP codes near 91701

ZIPCityDistance
91737 Rancho Cucamonga, CA 1.7 mi
91729 Rancho Cucamonga, CA 2.2 mi
91730 Rancho Cucamonga, CA 2.8 mi
91784 Upland, CA 3.2 mi
91785 Upland, CA 3.7 mi
91786 Upland, CA 4.2 mi
91764 Ontario, CA 4.4 mi
91739 Rancho Cucamonga, CA 4.9 mi
91743 Guasti, CA 5.1 mi
91758 Ontario, CA 5.9 mi

Find every ZIP code within 10 miles of 91701 →

Questions about this ZIP code

Where is ZIP code 91701?

91701 is in Rancho Cucamonga, California, in San Bernardino County, part of the Riverside-San Bernardino-Ontario, CA metropolitan area. Its published point location is 34.1378, -117.6003.

What county is 91701 in?

91701 lies in San Bernardino County.

What area code is 91701?

Rancho Cucamonga uses area codes 909 and 840, from NANPA's telephone records.

What time zone is 91701 in?

91701 uses America/Los_Angeles.

How many people live in 91701?

About 39,287 people live in ZIP code 91701, in 13,054 households, at 5,314.8 people per square mile. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.

What is the median household income in 91701?

$114,244 a year, against $99,122 across California.

What ZIP codes are near 91701?

The closest are 91737 (1.7 mi), 91729 (2.2 mi), 91730 (2.8 mi), 91784 (3.2 mi) and 91785 (3.7 mi).

Is 91701 a PO Box ZIP code?

91701 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “91701 ZIP Code — Rancho Cucamonga, California (San Bernardino County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/91701

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