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/54221

54221

ZIP 54221 is in Manitowoc, Wisconsin, in Manitowoc County; area codes 920 and 274; Central time. Manitowoc has 2 ZIP codes; the other is 54220.

Type
No street area
Time zone
America/Chicago
County
Manitowoc
Metro area
Manitowoc, WI
Coordinates
44.1323, -87.5990

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 54241, whose figures describe that area — not this ZIP code.

☼ Live from 54221 — Manitowoc, WI

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Where 54221 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 54221
  • 🔢 Type 54221 into a pocket calculator and turn it upside down: IZZhS — not quite a word, sorry.
  • ➕ As a number, 54,221 = 59 × 919. Its digits add up to 14, a total 1,416 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1101001111001101
  • 🏠 Its numerical neighbours: 54220 (Manitowoc, WI, 7 mi away) and 54226 (Maplewood, WI, 43 mi away).
  • 🔄 Backwards, 54221 becomes 12245 — and that is a real ZIP code: Albany, NY, 702 miles away.
  • 👥 32 other ZIP codes are made of exactly the same digits (12245, 12452, 12524, 12542, 14225, 14522, …). The farthest-flung twin is 12524 in Fishkill, NY, 717 miles away.
  • 🧭 Farther north than 88% of all ZIP codes, and farther east than 50%.
  • 🎯637 miles northeast of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 54221 and you would come out at 44.13°S, 92.40°E — 1,106 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 30m of daylight. Shortest: 8h 52m.
🌙 The sky over 54221 today
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🌋 Shake report
  • Checking the USGS…

Source: USGS.

Business and tax activity

Business establishments34This ZIP34
Employees1,555This ZIP1,555
Annual payroll$105,701,000This ZIP$105,701,000

Land area

ZIP codes near 54221

ZIPCityDistance
54241 Two Rivers, WI 5.8 mi
54220 Manitowoc, WI 6.8 mi
54214 Francis Creek, WI 7.3 mi
54228 Mishicot, WI 10.4 mi
54247 Whitelaw, WI 10.6 mi
54215 Kellnersville, WI 12.0 mi
54240 Tisch Mills, WI 13.5 mi
54227 Maribel, WI 14.6 mi
53063 Newton, WI 15.4 mi
54230 Reedsville, WI 15.8 mi

Find every ZIP code within 10 miles of 54221 →

Questions about this ZIP code

Where is ZIP code 54221?

54221 is in Manitowoc, Wisconsin, in Manitowoc County, part of the Manitowoc, WI micropolitan area. Its published point location is 44.1323, -87.5990.

What county is 54221 in?

54221 lies in Manitowoc County.

What area code is 54221?

Manitowoc uses area codes 920 and 274, from NANPA's telephone records.

What time zone is 54221 in?

54221 uses America/Chicago.

What ZIP codes are near 54221?

The closest are 54241 (5.8 mi), 54220 (6.8 mi), 54214 (7.3 mi), 54228 (10.4 mi) and 54247 (10.6 mi).

Is 54221 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. “54221 ZIP Code — Manitowoc, Wisconsin (Manitowoc County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/54221

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/54221.json

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