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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/51016

51016

ZIP 51016 is Correctionville, Iowa, mostly in Woodbury County; area code 712; Central time.

Type
Standard
Time zone
America/Chicago
County
Woodbury +1 more
Population
1,080
Coordinates
42.4718, -95.8053
☼ Live from 51016 — Correctionville, IA

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Local time: —

Where 51016 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 51016
  • 🔢 Type 51016 into a pocket calculator and turn it upside down: gIOIS — not quite a word, sorry.
  • ➕ As a number, 51,016 = 2 × 2 × 2 × 7 × 911. Its digits add up to 13, a total 1,179 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1100011101001000
  • 🏠 Its numerical neighbours: 51015 (Climbing Hill, IA, 17 mi away) and 51018 (Cushing, IA, 7 mi away).
  • 🔄 Backwards, 51016 becomes 61015 — and that is a real ZIP code: Chana, IL, 340 miles away.
  • 👥 39 other ZIP codes are made of exactly the same digits (01516, 01561, 01615, 05161, 06115, 06151, …). The farthest-flung twin is 01516 in Douglas, MA, 1,226 miles away.
  • 🧭 Farther north than 79% of all ZIP codes, and farther west than 71%.
  • 🎯233 miles northeast of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 51016 and you would come out at 42.47°S, 84.19°E — 821 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 18m of daylight. Shortest: 9h 04m.
  • 📏 At 104.8 square miles of land, 51016 is bigger than 79% of ZIP codes — room for about 80 Central Parks.
🌙 The sky over 51016 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population1,080This ZIP1,080
Households408This ZIP408
Housing units463This ZIP463
Median age34.3This ZIP34.3Iowa38.6US 38.9
Median household income$51,875This ZIP$51,875Iowa$75,059US $80,734
Median home value$89,400This ZIP$89,400Iowa$208,000US $332,700
Median gross rent$970This ZIP$970Iowa$972US $1,413
Bachelor's degree or higher19.0%This ZIP19.0%
Mean commute27.2 minThis ZIP27.2 min
Population density10.3 / sq miThis ZIP10.3 / sq mi

Business and tax activity

Business establishments31This ZIP31
Employees201This ZIP201
Annual payroll$10,409,000This ZIP$10,409,000
Tax returns filed600This ZIP600
Total adjusted gross income$43,163,000This ZIP$43,163,000

Land area

Land area104.82 sq miThis ZIP104.82 sq mi
Water area0.20 sq miThis ZIP0.20 sq mi

Counties 51016 spans

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

CountyShare of this ZIP
Woodbury County 90.5%
Ida County 9.5%

Other place names in 51016

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

ZIP codes near 51016

ZIPCityDistance
51048 Pierson, IA 5.8 mi
51018 Cushing, IA 6.5 mi
51061 Washta, IA 8.5 mi
51004 Anthon, IA 8.6 mi
51039 Moville, IA 12.6 mi
51028 Kingsley, IA 12.7 mi
51044 Oto, IA 12.8 mi
51025 Holstein, IA 12.8 mi
51049 Quimby, IA 13.7 mi
51019 Danbury, IA 14.2 mi

Find every ZIP code within 10 miles of 51016 →

Questions about this ZIP code

Where is ZIP code 51016?

51016 is in Correctionville, Iowa, in Woodbury County, part of the Sioux City, IA-NE-SD metropolitan area. Its published point location is 42.4718, -95.8053.

What county is 51016 in?

51016 spans 2 counties: Woodbury County and Ida 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 51016?

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

What time zone is 51016 in?

51016 uses America/Chicago.

How many people live in 51016?

About 1,080 people live in ZIP code 51016, in 408 households, at 10.3 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 51016?

$51,875 a year, against $75,059 across Iowa.

What ZIP codes are near 51016?

The closest are 51048 (5.8 mi), 51018 (6.5 mi), 51061 (8.5 mi), 51004 (8.6 mi) and 51039 (12.6 mi).

Is 51016 a PO Box ZIP code?

51016 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “51016 ZIP Code — Correctionville, Iowa (Woodbury County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/51016

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/51016.json

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