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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/51578

51578

ZIP 51578 is Westphalia, Iowa, in Shelby County; area code 712; Central time.

Type
Standard
Time zone
America/Chicago
County
Shelby
Metro area
none
Population
116
Coordinates
41.7201, -95.3951
☼ Live from 51578 — Westphalia, IA

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Local time: —

Where 51578 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 51578
  • 🔢 Type 51578 into a pocket calculator and turn it upside down: BLSIS — not quite a word, sorry.
  • ➕ As a number, 51,578 = 2 × 17 × 37 × 41. Its digits add up to 26, a total 2,038 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1100100101111010
  • 🏠 Its numerical neighbours: 51577 (Walnut, IA, 20 mi away) and 51579 (Woodbine, IA, 17 mi away).
  • 🔄 Backwards, 51578 becomes 87515 — and that is a real ZIP code: Canjilon, NM, 687 miles away.
  • 👥 18 other ZIP codes are made of exactly the same digits (15758, 15857, 17585, 17855, 55187, 55718, …). The farthest-flung twin is 78551 in Harlingen, TX, 1,077 miles away.
  • 🧭 Farther north than 73% of all ZIP codes, and farther west than 69%.
  • 🎯212 miles northeast of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 51578 and you would come out at 41.72°S, 84.60°E — 871 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 13m of daylight. Shortest: 9h 09m.
  • 📏 At 0.070 square miles of land, 51578 is bigger than 1% of ZIP codes — about 34 football fields.
🌙 The sky over 51578 today
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🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population116This ZIP116
Households61This ZIP61
Housing units70This ZIP70
Median age63.3This ZIP63.3Iowa38.6US 38.9
Median household income$77,292This ZIP$77,292Iowa$75,059US $80,734
Median home value$97,600This ZIP$97,600Iowa$208,000US $332,700
Bachelor's degree or higher13.9%This ZIP13.9%
Mean commute23.9 minThis ZIP23.9 min
Population density1,657.1 / sq miThis ZIP1,657.1 / sq mi

Business and tax activity

Business establishments3This ZIP3
Employees12This ZIP12
Annual payroll$484,000This ZIP$484,000

Land area

Land area0.07 sq miThis ZIP0.07 sq mi
Water area0.00 sq mi

Other place names in 51578

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

ZIP codes near 51578

ZIPCityDistance
51530 Earling, IA 5.0 mi
51562 Panama, IA 5.1 mi
51537 Harlan, IA 7.0 mi
51565 Portsmouth, IA 8.5 mi
51527 Defiance, IA 8.8 mi
51447 Kirkman, IA 10.5 mi
51446 Irwin, IA 11.1 mi
51570 Shelby, IA 13.8 mi
51528 Dow City, IA 14.1 mi
51563 Persia, IA 14.3 mi

Find every ZIP code within 10 miles of 51578 →

Questions about this ZIP code

Where is ZIP code 51578?

51578 is in Westphalia, Iowa, in Shelby County. Its published point location is 41.7201, -95.3951.

What county is 51578 in?

51578 lies in Shelby County.

What area code is 51578?

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

What time zone is 51578 in?

51578 uses America/Chicago.

How many people live in 51578?

About 116 people live in ZIP code 51578, in 61 households, at 1,657.1 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 51578?

$77,292 a year, against $75,059 across Iowa.

What ZIP codes are near 51578?

The closest are 51530 (5 mi), 51562 (5.1 mi), 51537 (7 mi), 51565 (8.5 mi) and 51527 (8.8 mi).

Is 51578 a PO Box ZIP code?

51578 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “51578 ZIP Code — Westphalia, Iowa (Shelby County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/51578

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