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/07091

07091

ZIP 07091 is in Westfield, New Jersey, in Union County; area code 908; Eastern time. Westfield has 2 ZIP codes; the other is 07090.

Type
No street area
Time zone
America/New_York
County
Union
Coordinates
40.6657, -74.2997

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 07016, whose figures describe that area — not this ZIP code.

☼ Live from 07091 — Westfield, NJ

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Where 07091 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 07091
  • 🔢 Type 07091 into a pocket calculator and turn it upside down: IGOLO — not quite a word, sorry.
  • ➕ As a number, 7,091 = 7 × 1013. Its digits add up to 17, a total 2,133 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1101110110011
  • 🏠 Its numerical neighbours: 07090 (Westfield, NJ, 2 mi away) and 07092 (Mountainside, NJ, 3 mi away).
  • 🔄 Backwards, 07091 becomes 19070 — and that is a real ZIP code: Morton, PA, 75 miles away.
  • 👥 31 other ZIP codes are made of exactly the same digits (00719, 00791, 00917, 00971, 01079, 01097, …). The farthest-flung twin is 09071 in APO AE, a military post office, 4,016 miles away.
  • 🧭 Farther north than 63% of all ZIP codes, and farther east than 89%.
  • 🎯1,278 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 07091 and you would come out at 40.67°S, 105.70°E — 825 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 05m of daylight. Shortest: 9h 15m.
🌙 The sky over 07091 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

Business and tax activity

Business establishments13This ZIP13
Employees140This ZIP140
Annual payroll$10,584,000This ZIP$10,584,000

Land area

ZIP codes near 07091

ZIPCityDistance
07061 Plainfield, NJ 0.0 mi
07016 Cranford, NJ 0.6 mi
07033 Kenilworth, NJ 1.0 mi
07027 Garwood, NJ 1.6 mi
07204 Roselle Park, NJ 1.7 mi
07203 Roselle, NJ 2.3 mi
07090 Westfield, NJ 2.5 mi
07083 Union, NJ 2.6 mi
07081 Springfield, NJ 2.9 mi
07066 Clark, NJ 3.2 mi

Find every ZIP code within 10 miles of 07091 →

Questions about this ZIP code

Where is ZIP code 07091?

07091 is in Westfield, New Jersey, in Union County, part of the New York-Newark-Jersey City, NY-NJ metropolitan area. Its published point location is 40.6657, -74.2997.

What county is 07091 in?

07091 lies in Union County.

What area code is 07091?

Westfield uses area code 908, from NANPA's telephone records.

What time zone is 07091 in?

07091 uses America/New_York.

What ZIP codes are near 07091?

The closest are 07061 (0 mi), 07016 (0.6 mi), 07033 (1 mi), 07027 (1.6 mi) and 07204 (1.7 mi).

Is 07091 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. “07091 ZIP Code — Westfield, New Jersey (Union County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/07091

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/07091.json

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