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zipcodes.pro — ZIP/51055

51055

ZIP 51055 is Sloan, Iowa, mostly in Woodbury County; area code 712; Central time.

Type
Standard
Time zone
America/Chicago
County
Woodbury +1 more
Population
1,346
Coordinates
42.2082, -96.2603
☼ Live from 51055 — Sloan, IA

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Local time: —

Where 51055 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 51055
  • 🔢 Type 51055 into a pocket calculator and turn it upside down: SSOIS — not quite a word, sorry.
  • ➕ As a number, 51,055 = 5 × 10211. Its digits add up to 16, a total 1,922 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1100011101101111
  • 🏠 Its numerical neighbours: 51054 (Sergeant Bluff, IA, 13 mi away) and 51056 (Smithland, IA, 16 mi away).
  • 🔄 Backwards, 51055 becomes 55015, 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, 1,188 miles away.
  • 🧭 Farther north than 77% of all ZIP codes, and farther west than 72%.
  • 🎯204 miles northeast of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 51055 and you would come out at 42.21°S, 83.74°E — 815 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 16m of daylight. Shortest: 9h 05m.
  • 📏 At 62.8 square miles of land, 51055 is bigger than 66% of ZIP codes — room for about 48 Central Parks.
🌙 The sky over 51055 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population1,346This ZIP1,346
Households548This ZIP548
Housing units548This ZIP548
Median age44.9This ZIP44.9Iowa38.6US 38.9
Median household income$72,143This ZIP$72,143Iowa$75,059US $80,734
Median home value$218,300This ZIP$218,300Iowa$208,000US $332,700
Median gross rent$781This ZIP$781Iowa$972US $1,413
Bachelor's degree or higher27.9%This ZIP27.9%
Mean commute19.6 minThis ZIP19.6 min
Population density21.4 / sq miThis ZIP21.4 / sq mi

Business and tax activity

Business establishments32This ZIP32
Employees404This ZIP404
Annual payroll$13,682,000This ZIP$13,682,000
Tax returns filed660This ZIP660
Total adjusted gross income$50,881,000This ZIP$50,881,000

Land area

Land area62.76 sq miThis ZIP62.76 sq mi
Water area0.81 sq miThis ZIP0.81 sq mi

Counties 51055 spans

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

CountyShare of this ZIP
Woodbury County 51.4%
Monona County 48.6%

Other place names in 51055

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

ZIP codes near 51055

ZIPCityDistance
51063 Whiting, IA 6.3 mi
51052 Salix, IA 6.9 mi
68039 Macy, NE 7.7 mi
51026 Hornick, IA 10.4 mi
68071 Winnebago, NE 11.2 mi
51102 Sioux City, IA 11.5 mi
68067 Walthill, NE 12.2 mi
51054 Sergeant Bluff, IA 12.5 mi
68030 Homer, NE 12.9 mi
51015 Climbing Hill, IA 12.9 mi

Find every ZIP code within 10 miles of 51055 →

Questions about this ZIP code

Where is ZIP code 51055?

51055 is in Sloan, Iowa, in Woodbury County, part of the Sioux City, IA-NE-SD metropolitan area. Its published point location is 42.2082, -96.2603.

What county is 51055 in?

51055 spans 2 counties: Woodbury County and Monona County. Most of it falls in Woodbury 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 51055?

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

What time zone is 51055 in?

51055 uses America/Chicago.

How many people live in 51055?

About 1,346 people live in ZIP code 51055, in 548 households, at 21.4 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 51055?

$72,143 a year, against $75,059 across Iowa.

What ZIP codes are near 51055?

The closest are 51063 (6.3 mi), 51052 (6.9 mi), 68039 (7.7 mi), 51026 (10.4 mi) and 68071 (11.2 mi).

Is 51055 a PO Box ZIP code?

51055 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “51055 ZIP Code — Sloan, Iowa (Woodbury County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/51055

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/51055.json

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