Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

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/91758

91758

ZIP 91758 is in Ontario, California, in San Bernardino County; area codes 909 and 840; Pacific time. Ontario has 4 ZIP codes; the others are 91761, 91762 and 91764.

Type
No street area
Time zone
America/Los_Angeles
Coordinates
34.0633, -117.6509

The Census map gives this ZIP code no delivery area of its own, which usually means it serves post office boxes, a single organization or a post office rather than streets of homes.

This ZIP code has no Census tabulation area of its own. Its point falls inside ZCTA 91762, whose figures describe that area — not this ZIP code.

☼ Live from 91758 — Ontario, CA

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Where 91758 is

This ZIP code has no Census tabulation area, so there is no boundary to draw — the marker is its published point location.

★ Weird and wonderful facts about 91758
  • 🔢 Type 91758 into a pocket calculator and turn it upside down: BSLIG — not quite a word, sorry.
  • ➕ As a number, 91,758 = 2 × 3 × 41 × 373. Its digits add up to 30, a total 1,024 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10110011001101110
  • 🏠 Its numerical neighbours: 91756 (Monterey Park, CA, 27 mi away) and 91759 (Mount Baldy, CA, 14 mi away).
  • 🔄 Backwards, 91758 becomes 85719 — and that is a real ZIP code: Tucson, AZ, 407 miles away.
  • 👥 23 other ZIP codes are made of exactly the same digits (17859, 17985, 18957, 57198, 59718, 59871, …). The farthest-flung twin is 18957 in Salford, PA, 2,340 miles away.
  • 🧭 Farther south than 79% of all ZIP codes, and farther west than 90%.
  • 🎯1,123 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 91758 and you would come out at 34.06°S, 62.35°E — 1,003 miles from Saint-Denis, Reunion, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 26m of daylight. Shortest: 9h 53m.
🌙 The sky over 91758 today
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Source: USGS.

Business and tax activity

Business establishments3This ZIP3
Employees67This ZIP67
Annual payroll$3,342,000This ZIP$3,342,000

Land area

ZIP codes near 91758

ZIPCityDistance
91762 Ontario, CA 1.1 mi
91764 Ontario, CA 2.7 mi
91763 Montclair, CA 2.8 mi
91786 Upland, CA 3.0 mi
91785 Upland, CA 3.6 mi
91743 Guasti, CA 3.7 mi
91761 Ontario, CA 3.9 mi
91710 Chino, CA 4.4 mi
91729 Rancho Cucamonga, CA 4.5 mi
91730 Rancho Cucamonga, CA 4.7 mi

Find every ZIP code within 10 miles of 91758 →

Questions about this ZIP code

Where is ZIP code 91758?

91758 is in Ontario, California, in San Bernardino County, part of the Riverside-San Bernardino-Ontario, CA metropolitan area. Its published point location is 34.0633, -117.6509.

What county is 91758 in?

91758 lies in San Bernardino County.

What area code is 91758?

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

What time zone is 91758 in?

91758 uses America/Los_Angeles.

What ZIP codes are near 91758?

The closest are 91762 (1.1 mi), 91764 (2.7 mi), 91763 (2.8 mi), 91786 (3 mi) and 91785 (3.6 mi).

Is 91758 a PO Box ZIP code?

Possibly. The Census map gives this ZIP code no delivery area of its own, which usually means it serves post office boxes, a single organization or a post office rather than streets of homes.

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Cite this page

zipcodes.pro. “91758 ZIP Code — Ontario, California (San Bernardino County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/91758

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/91758.json

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