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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/51550

51550

ZIP 51550 is Magnolia, Iowa, in Harrison County; area code 712; Central time.

Type
Standard
Time zone
America/Chicago
County
Harrison
Metro area
Omaha, NE-IA
Population
169
Coordinates
41.6924, -95.8739
☼ Live from 51550 — Magnolia, IA

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Local time: —

Where 51550 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 51550
  • 🔢 Type 51550 into a pocket calculator and turn it upside down: OSSIS — not quite a word, sorry.
  • ➕ As a number, 51,550 = 2 × 5 × 5 × 1031. Its digits add up to 16, a total 1,922 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1100100101011110
  • 🏠 Its numerical neighbours: 51549 (Macedonia, IA, 41 mi away) and 51551 (Malvern, IA, 51 mi away).
  • 🔄 Backwards, 51550 becomes 05515, which is not a ZIP code at all.
  • 👥 10 other ZIP codes are made of exactly the same digits (05155, 15055, 15550, 50155, 50515, 50551, …). The farthest-flung twin is 05155 in South Londonderry, VT, 1,176 miles away.
  • 🧭 Farther north than 73% of all ZIP codes, and farther west than 71%.
  • 🎯191 miles northeast of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 51550 and you would come out at 41.69°S, 84.13°E — 854 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 12m of daylight. Shortest: 9h 09m.
  • 📏 At 0.572 square miles of land, 51550 is bigger than 6% of ZIP codes — about 277 football fields.
🌙 The sky over 51550 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population169This ZIP169
Households74This ZIP74
Housing units78This ZIP78
Median age42.5This ZIP42.5Iowa38.6US 38.9
Median household income$77,500This ZIP$77,500Iowa$75,059US $80,734
Median home value$105,500This ZIP$105,500Iowa$208,000US $332,700
Median gross rent$1,354This ZIP$1,354Iowa$972US $1,413
Bachelor's degree or higher19.8%This ZIP19.8%
Mean commute23.4 minThis ZIP23.4 min
Population density295.5 / sq miThis ZIP295.5 / sq mi

Land area

Land area0.57 sq miThis ZIP0.57 sq mi
Water area0.00 sq mi

Other place names in 51550

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

ZIP codes near 51550

ZIPCityDistance
51546 Logan, IA 6.8 mi
51557 Mondamin, IA 7.4 mi
51564 Pisgah, IA 8.5 mi
51556 Modale, IA 9.2 mi
51579 Woodbine, IA 9.3 mi
51555 Missouri Valley, IA 9.4 mi
51545 Little Sioux, IA 13.1 mi
51558 Moorhead, IA 15.5 mi
51529 Dunlap, IA 16.6 mi
51563 Persia, IA 17.1 mi

Find every ZIP code within 10 miles of 51550 →

Questions about this ZIP code

Where is ZIP code 51550?

51550 is in Magnolia, Iowa, in Harrison County, part of the Omaha, NE-IA metropolitan area. Its published point location is 41.6924, -95.8739.

What county is 51550 in?

51550 lies in Harrison County.

What area code is 51550?

Magnolia uses area code 712, from NANPA's telephone records.

What time zone is 51550 in?

51550 uses America/Chicago.

How many people live in 51550?

About 169 people live in ZIP code 51550, in 74 households, at 295.5 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 51550?

$77,500 a year, against $75,059 across Iowa.

What ZIP codes are near 51550?

The closest are 51546 (6.8 mi), 51557 (7.4 mi), 51564 (8.5 mi), 51556 (9.2 mi) and 51579 (9.3 mi).

Is 51550 a PO Box ZIP code?

51550 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “51550 ZIP Code — Magnolia, Iowa (Harrison County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/51550

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