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/ID/IRWIN

Irwin ZIP code, Idaho

The ZIP code for Irwin, ID is 83428, and its area code is 208.

USPS city name
1 ZIP code
Overlapping the city
1 more
Population
236
Area code
208
State
Idaho

Mail addressed to Irwin uses the ZIP code above. 1 more ZIP code covers part of the city but is addressed as somewhere else; they are listed separately below.

Irwin in numbers

About 236 people live in Irwin, in 124 households. The median household income is $67,500 a year, 13% below the Idaho median of $77,800 (US: $80,734). The median owner-occupied home is valued at $433,300 (4% above the Idaho median). The median age is 57.8; 26.9% of adults 25 and over hold a bachelor's degree or higher (31.8% across Idaho); the average commute takes 59 minutes.

Population236Irwin236
Households124Irwin124
Median age57.8Irwin57.8Idaho37.3US 38.9
Median household income$67,500Irwin$67,500Idaho$77,800US $80,734
Median home value$433,300Irwin$433,300Idaho$418,600US $332,700
Bachelor's degree or higher26.9%Irwin26.9%Idaho31.8%US 35.7%
Mean commute59.4 minIrwin59.4 minIdaho21.6 minUS 26.4 min
Population density90 / sq miIrwin90 / 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
83428 Irwin , ID Standard 576 $68,750 $574,400

Other ZIP codes overlapping Irwin

These ZIP codes cover part of Irwin but are addressed as somewhere else.

ZIP codes overlapping Irwin
ZIP City Type Population Median income Median home
83449 Swan Valley , ID Standard 273 $82,368 $574,000

Map of Irwin ZIP codes

83428

The ZIP codes of Irwin, ID, 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 Swan Valley (281 people, 3.5 mi), Victor (3,067 people, 16 mi) and Wilson, WY (1,113 people, 19 mi).

Towns near Irwin
TownPopulationDistance
Victor 3,067 16.1 mi
Driggs 2,925 24.2 mi
Jackson, WY 10,756 25.7 mi

More nearby: every ZIP code in Bonneville County · Idaho ZIP codes

Cite this page

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

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