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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/51555

51555

ZIP 51555 is Missouri Valley, Iowa, mostly in Harrison County; area code 712; Central time.

Type
Standard
Time zone
America/Chicago
County
Harrison +1 more
Metro area
Omaha, NE-IA
Population
4,952
Coordinates
41.5595, -95.9153
☼ Live from 51555 — Missouri Valley, IA

Weather right now

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Local time: —

Where 51555 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 51555
  • 🔢 Type 51555 into a pocket calculator and turn it upside down: SSSIS — not quite a word, sorry.
  • ➕ As a number, 51,555 = 3 × 5 × 7 × 491. Its digits add up to 21, a total 2,594 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1100100101100011
  • 🏠 Its numerical neighbours: 51554 (Mineola, IA, 31 mi away) and 51556 (Modale, IA, 9 mi away).
  • 🔄 Backwards, 51555 becomes 55515, which is not a ZIP code at all.
  • 👥 3 other ZIP codes are made of exactly the same digits (15555, 55155, 55551). The farthest-flung twin is 15555 in Quecreek, PA, 884 miles away.
  • 🧭 Farther north than 71% of all ZIP codes, and farther west than 71%.
  • 🎯184 miles northeast of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 51555 and you would come out at 41.56°S, 84.08°E — 859 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 11m of daylight. Shortest: 9h 10m.
  • 📏 At 146.1 square miles of land, 51555 is bigger than 86% of ZIP codes — room for about 111 Central Parks.
🌙 The sky over 51555 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population4,952This ZIP4,952
Households2,148This ZIP2,148
Housing units2,324This ZIP2,324
Median age42.6This ZIP42.6Iowa38.6US 38.9
Median household income$85,273This ZIP$85,273Iowa$75,059US $80,734
Median home value$188,700This ZIP$188,700Iowa$208,000US $332,700
Median gross rent$812This ZIP$812Iowa$972US $1,413
Bachelor's degree or higher23.8%This ZIP23.8%
Mean commute24.6 minThis ZIP24.6 min
Population density33.9 / sq miThis ZIP33.9 / sq mi

Business and tax activity

Business establishments127This ZIP127
Employees1,427This ZIP1,427
Annual payroll$68,788,000This ZIP$68,788,000
Tax returns filed2,400This ZIP2,400
Total adjusted gross income$188,783,000This ZIP$188,783,000

Land area

Land area146.10 sq miThis ZIP146.10 sq mi
Water area2.44 sq miThis ZIP2.44 sq mi

Counties 51555 spans

A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.

CountyShare of this ZIP
Harrison County 81.6%
Pottawattamie County 18.4%

Other place names in 51555

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

ZIP codes near 51555

ZIPCityDistance
68023 Fort Calhoun, NE 8.3 mi
51556 Modale, IA 8.6 mi
51542 Honey Creek, IA 9.3 mi
51546 Logan, IA 9.4 mi
51550 Magnolia, IA 9.4 mi
68112 Omaha, NE 12.4 mi
51557 Mondamin, IA 12.9 mi
51526 Crescent, IA 13.0 mi
68008 Blair, NE 13.2 mi
68009 Blair, NE 13.9 mi

Find every ZIP code within 10 miles of 51555 →

Questions about this ZIP code

Where is ZIP code 51555?

51555 is in Missouri Valley, Iowa, in Harrison County, part of the Omaha, NE-IA metropolitan area. Its published point location is 41.5595, -95.9153.

What county is 51555 in?

51555 spans 2 counties: Harrison County and Pottawattamie County. Most of it falls in Harrison County, measured by overlapping land area — the county holding the most land in a ZIP code is not always the one holding the most residents.

What area code is 51555?

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

What time zone is 51555 in?

51555 uses America/Chicago.

How many people live in 51555?

About 4,952 people live in ZIP code 51555, in 2,148 households, at 33.9 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 51555?

$85,273 a year, against $75,059 across Iowa.

What ZIP codes are near 51555?

The closest are 68023 (8.3 mi), 51556 (8.6 mi), 51542 (9.3 mi), 51546 (9.4 mi) and 51550 (9.4 mi).

Is 51555 a PO Box ZIP code?

51555 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “51555 ZIP Code — Missouri Valley, Iowa (Harrison County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/51555

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/51555.json

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