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/50401

50401

ZIP 50401 is in Mason City, Iowa, in Cerro Gordo County; area code 641; Central time. Mason City has 2 ZIP codes; the other is 50402.

Type
Standard
Time zone
America/Chicago
County
Cerro Gordo
Metro area
Mason City, IA
Population
28,703
Coordinates
43.1541, -93.1998
☼ Live from 50401 — Mason City, IA

Weather right now

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Local time: —

Where 50401 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 50401
  • 🔢 Type 50401 into a pocket calculator and turn it upside down: IOhOS — not quite a word, sorry.
  • ➕ As a number, 50,401 = 13 × 3877. Its digits add up to 10, a total 513 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1100010011100001
  • 🏠 Its numerical neighbours: 50398 (Urbandale, IA, 109 mi away) and 50402 (Mason City, IA, 0 mi away).
  • 🔄 Backwards, 50401 becomes 10405, which is not a ZIP code at all.
  • 👥 27 other ZIP codes are made of exactly the same digits (01054, 01450, 01504, 01540, 04015, 04051, …). The farthest-flung twin is 04105 in Falmouth, ME, 1,147 miles away.
  • 🧭 Farther north than 84% of all ZIP codes, and farther west than 64%.
  • 🎯361 miles northeast of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 50401 and you would come out at 43.15°S, 86.80°E — 898 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 23m of daylight. Shortest: 8h 59m.
  • 📏 At 148.2 square miles of land, 50401 is bigger than 86% of ZIP codes — room for about 112 Central Parks.
🌙 The sky over 50401 today
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🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population28,703This ZIP28,703
Households13,321This ZIP13,321
Housing units14,875This ZIP14,875
Median age42.2This ZIP42.2Iowa38.6US 38.9
Median household income$66,072This ZIP$66,072Iowa$75,059US $80,734
Median home value$146,500This ZIP$146,500Iowa$208,000US $332,700
Median gross rent$875This ZIP$875Iowa$972US $1,413
Bachelor's degree or higher21.4%This ZIP21.4%
Mean commute13.7 minThis ZIP13.7 min
Population density193.7 / sq miThis ZIP193.7 / sq mi

Business and tax activity

Business establishments899This ZIP899
Employees15,100This ZIP15,100
Annual payroll$749,922,000This ZIP$749,922,000
Tax returns filed13,150This ZIP13,150
Total adjusted gross income$919,898,000This ZIP$919,898,000

Land area

Land area148.17 sq miThis ZIP148.17 sq mi
Water area0.47 sq miThis ZIP0.47 sq mi

Other place names in 50401

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

ZIP codes near 50401

ZIPCityDistance
50402 Mason City, IA 0.1 mi
50467 Rock Falls, IA 7.7 mi
50464 Plymouth, IA 9.2 mi
50458 Nora Springs, IA 9.5 mi
50456 Manly, IA 9.5 mi
50428 Clear Lake, IA 9.7 mi
50469 Rockwell, IA 10.7 mi
50477 Swaledale, IA 13.2 mi
50444 Hanlontown, IA 13.5 mi
50448 Kensett, IA 13.7 mi

Find every ZIP code within 10 miles of 50401 →

Questions about this ZIP code

Where is ZIP code 50401?

50401 is in Mason City, Iowa, in Cerro Gordo County, part of the Mason City, IA micropolitan area. Its published point location is 43.1541, -93.1998.

What county is 50401 in?

50401 lies in Cerro Gordo County.

What area code is 50401?

Mason City uses area code 641, from NANPA's telephone records.

What time zone is 50401 in?

50401 uses America/Chicago.

How many people live in 50401?

About 28,703 people live in ZIP code 50401, in 13,321 households, at 193.7 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 50401?

$66,072 a year, against $75,059 across Iowa.

What ZIP codes are near 50401?

The closest are 50402 (0.1 mi), 50467 (7.7 mi), 50464 (9.2 mi), 50458 (9.5 mi) and 50456 (9.5 mi).

Is 50401 a PO Box ZIP code?

50401 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “50401 ZIP Code — Mason City, Iowa (Cerro Gordo County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/50401

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