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/28111

28111

ZIP 28111 is in Monroe, North Carolina, in Union County; area codes 704 and 980; Eastern time. Monroe has 3 ZIP codes; the others are 28110 and 28112.

Type
No street area
Time zone
America/New_York
County
Union
Coordinates
35.0112, -80.5587

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 28110, whose figures describe that area — not this ZIP code.

☼ Live from 28111 — Monroe, NC

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Where 28111 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 28111
  • 🔢 Type 28111 into a pocket calculator and turn it upside down: IIIBZ — not quite a word, sorry.
  • ➕ 28111 is a prime number. It cannot be divided by anything except 1 and itself. Its digits add up to 13, a total 1,179 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 110110111001111
  • 🏠 Its numerical neighbours: 28110 (Monroe, NC, 5 mi away) and 28112 (Monroe, NC, 8 mi away).
  • 🔄 Backwards, 28111 becomes 11182, which is not a ZIP code at all.
  • 👥 8 other ZIP codes are made of exactly the same digits (11218, 12118, 12181, 12811, 18211, 21811, …). The farthest-flung twin is 81121 in Arboles, CO, 1,503 miles away.
  • 🧭 Farther south than 74% of all ZIP codes, and farther east than 72%.
  • 🎯1,041 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 28111 and you would come out at 35.01°S, 99.44°E — 968 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 31m of daylight. Shortest: 9h 48m.
🌙 The sky over 28111 today
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  • Checking the USGS…

Source: USGS.

Business and tax activity

Business establishments25This ZIP25
Employees4,116This ZIP4,116
Annual payroll$237,797,000This ZIP$237,797,000

Land area

ZIP codes near 28111

ZIPCityDistance
28110 Monroe, NC 4.7 mi
28174 Wingate, NC 7.3 mi
28079 Indian Trail, NC 7.5 mi
28112 Monroe, NC 8.4 mi
28104 Matthews, NC 8.5 mi
28108 Mineral Springs, NC 8.7 mi
28105 Matthews, NC 11.4 mi
28173 Waxhaw, NC 11.6 mi
28103 Marshville, NC 11.8 mi
28227 Charlotte, NC 13.3 mi

Find every ZIP code within 10 miles of 28111 →

Questions about this ZIP code

Where is ZIP code 28111?

28111 is in Monroe, North Carolina, in Union County, part of the Charlotte-Concord-Gastonia, NC-SC metropolitan area. Its published point location is 35.0112, -80.5587.

What county is 28111 in?

28111 lies in Union County.

What area code is 28111?

Monroe uses area codes 704 and 980, from NANPA's telephone records.

What time zone is 28111 in?

28111 uses America/New_York.

What ZIP codes are near 28111?

The closest are 28110 (4.7 mi), 28174 (7.3 mi), 28079 (7.5 mi), 28112 (8.4 mi) and 28104 (8.5 mi).

Is 28111 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. “28111 ZIP Code — Monroe, North Carolina (Union County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/28111

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/28111.json

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