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/51601

51601

ZIP 51601 is in Shenandoah, Iowa, mostly in Page County; area code 712; Central time. Shenandoah has 2 ZIP codes; the other is 51603.

Type
Standard
Time zone
America/Chicago
County
Page +1 more
Metro area
none
Population
5,629
Coordinates
40.7355, -95.3470
☼ Live from 51601 — Shenandoah, IA

Weather right now

Asking the National Weather Service…

NEXRAD radar
Finding the nearest radar…
Local time: —

Where 51601 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 51601
  • 🔢 Type 51601 into a pocket calculator and turn it upside down: IOgIS — not quite a word, sorry.
  • ➕ As a number, 51,601 = 11 × 4691. Its digits add up to 13, a total 1,179 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1100100110010001
  • 🏠 Its numerical neighbours: 51593 (Harlan, IA, 53 mi away) and 51603 (Shenandoah, IA, 2 mi away).
  • 🔄 Backwards, 51601 becomes 10615, which is not a ZIP code at all.
  • 👥 39 other ZIP codes are made of exactly the same digits (01516, 01561, 01615, 05161, 06115, 06151, …). The farthest-flung twin is 01561 in South Lancaster, MA, 1,224 miles away.
  • 🧭 Farther north than 64% of all ZIP codes, and farther west than 69%.
  • 🎯182 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 51601 and you would come out at 40.74°S, 84.65°E — 920 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 06m of daylight. Shortest: 9h 15m.
  • 📏 At 103.3 square miles of land, 51601 is bigger than 78% of ZIP codes — room for about 78 Central Parks.
🌙 The sky over 51601 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population5,629This ZIP5,629
Households2,522This ZIP2,522
Housing units2,828This ZIP2,828
Median age47.0This ZIP47.0Iowa38.6US 38.9
Median household income$62,143This ZIP$62,143Iowa$75,059US $80,734
Median home value$124,200This ZIP$124,200Iowa$208,000US $332,700
Median gross rent$780This ZIP$780Iowa$972US $1,413
Bachelor's degree or higher19.4%This ZIP19.4%
Mean commute14.7 minThis ZIP14.7 min
Population density54.5 / sq miThis ZIP54.5 / sq mi

Business and tax activity

Business establishments185This ZIP185
Employees2,858This ZIP2,858
Annual payroll$132,726,000This ZIP$132,726,000
Tax returns filed2,520This ZIP2,520
Total adjusted gross income$162,358,000This ZIP$162,358,000

Land area

Land area103.27 sq miThis ZIP103.27 sq mi
Water area0.10 sq miThis ZIP0.10 sq mi

Counties 51601 spans

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

CountyShare of this ZIP
Page County 62.7%
Fremont County 37.3%

Other place names in 51601

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

ZIP codes near 51601

ZIPCityDistance
51603 Shenandoah, IA 2.5 mi
51639 Farragut, IA 6.3 mi
51636 Coin, IA 7.5 mi
51638 Essex, IA 8.2 mi
51647 Northboro, IA 9.0 mi
51656 Yorktown, IA 10.1 mi
51645 Imogene, IA 10.9 mi
51650 Riverton, IA 11.4 mi
51630 Blanchard, IA 12.3 mi
51649 Randolph, IA 12.3 mi

Find every ZIP code within 10 miles of 51601 →

Questions about this ZIP code

Where is ZIP code 51601?

51601 is in Shenandoah, Iowa, in Page County. Its published point location is 40.7355, -95.3470.

What county is 51601 in?

51601 spans 2 counties: Page County and Fremont County. Most of it falls in Page 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 51601?

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

What time zone is 51601 in?

51601 uses America/Chicago.

How many people live in 51601?

About 5,629 people live in ZIP code 51601, in 2,522 households, at 54.5 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 51601?

$62,143 a year, against $75,059 across Iowa.

What ZIP codes are near 51601?

The closest are 51603 (2.5 mi), 51639 (6.3 mi), 51636 (7.5 mi), 51638 (8.2 mi) and 51647 (9 mi).

Is 51601 a PO Box ZIP code?

51601 is a standard ZIP code. A normal ZIP code with street delivery.

Download or cite

Cite this page

zipcodes.pro. “51601 ZIP Code — Shenandoah, Iowa (Page County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/51601

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/51601.json

Underlying data is public domain or openly licensed — sources, vintages and licences.