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 — CITY/IA/IRWIN

Irwin ZIP code, Iowa

The ZIP code for Irwin, IA is 51446, and its area code is 712.

USPS city name
1 ZIP code
Population
352
Area code
712
State
Iowa

Irwin in numbers

About 352 people live in Irwin, in 173 households. The median household income is $40,417 a year, 46% below the Iowa median of $75,059 (US: $80,734). The median owner-occupied home is valued at $72,900 (65% below the Iowa median), and median gross rent is $705 a month. The median age is 48.5; 24.6% of adults 25 and over hold a bachelor's degree or higher (31.4% across Iowa); the average commute takes 18 minutes.

Population352Irwin352
Households173Irwin173
Median age48.5Irwin48.5Iowa38.6US 38.9
Median household income$40,417Irwin$40,417Iowa$75,059US $80,734
Median home value$72,900Irwin$72,900Iowa$208,000US $332,700
Median gross rent$705Irwin$705Iowa$972US $1,413
Bachelor's degree or higher24.6%Irwin24.6%Iowa31.4%US 35.7%
Mean commute17.9 minIrwin17.9 minIowa19.8 minUS 26.4 min
Population density601 / sq miIrwin601 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the census place Irwin city. Survey estimates carry margins of error, wider for small places. Sources and methods.

ZIP codes addressed as Irwin

ZIP codes with the USPS city name Irwin
ZIP City Type Population Median income Median home
51446 Irwin , IA Standard 499 $62,750 $91,400

Map of Irwin ZIP codes

51446

The ZIP codes of Irwin, IA, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Towns near Irwin

The nearest larger towns are Manilla (630 people, 7.2 mi), Earling (478 people, 11 mi) and Manning (1,533 people, 11 mi).

Towns near Irwin
TownPopulationDistance
Harlan 4,891 11.5 mi
Denison 8,260 17.3 mi
Carroll 10,208 26.2 mi
Atlantic 6,763 29.1 mi

More nearby: every ZIP code in Shelby County · Iowa ZIP codes

Cite this page

zipcodes.pro. “Irwin, IA ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/ia/irwin

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